When running the current build on GIT on an Ivy Bridge processor, I get an invalid instruction error (MULX, since Ivy Bridge does not support BMI(2)) at 0x000000013F571B43. This happens when the prompt ([C]>> [/C]) is already displayed. Is the processor too old to be supported out of the box?

2.07 looping
I've just had an incidence of version 2.07 looping. I'm factoring a C95 cofactor of 91+67.70, and it finds a PRP12 pretty quickly.
[CODE]11/09/21 10:56:48, 11/09/21 10:56:48, **************************** 11/09/21 10:56:48, Starting factorization of 37326054197207092012449090827705952368469419408554473227653125359479846855729858064360761261 11/09/21 10:56:48, using pretesting plan: noecm 11/09/21 10:56:48, no tune info: using qs/gnfs crossover of 95 digits 11/09/21 10:56:48, no tune info: using qs/snfs crossover of 75 digits 11/09/21 10:56:48, **************************** 11/09/21 10:56:48, rho: x^2 + 3, starting 1000 iterations on C92 11/09/21 10:56:48, rho: x^2 + 2, starting 1000 iterations on C92 11/09/21 10:56:48, prp12 = 129399203081 11/09/21 10:56:48, rho: x^2 + 2, starting 1000 iterations on C81 11/09/21 10:56:48, rho: x^2 + 1, starting 1000 iterations on C81 11/09/21 10:56:49, pm1: starting B1 = 150K, B2 = gmpecm default on C81 11/09/21 10:56:49, final ECM pretested depth: 0.00 11/09/21 10:56:49, scheduler: switching to sieve method 11/09/21 10:56:49, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 10:56:49, random seed: 12023120550948929971 11/09/21 10:57:29, ==== sieve params ==== 11/09/21 10:57:29, n = 82 digits, 273 bits 11/09/21 10:57:29, factor base: 49712 primes (max prime = 1290539) 11/09/21 10:57:29, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 10:57:29, double large prime range from 1665490910521 to 362485408947117 11/09/21 10:57:29, DLP MFB = 1.80 11/09/21 10:57:29, allocating 7 large prime slices of factor base 11/09/21 10:57:29, buckets hold 2048 elements 11/09/21 10:57:29, large prime hashtables have 802816 bytes 11/09/21 10:57:29, using AVX2 enabled 32k sieve core 11/09/21 10:57:29, sieve interval: 7 blocks of size 32768 11/09/21 10:57:29, polynomial A has ~ 10 factors 11/09/21 10:57:29, using multiplier of 29 11/09/21 10:57:29, using multiplier of 29 11/09/21 10:57:29, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 10:57:29, using SPV correction of 21 bits, starting at offset 34 11/09/21 10:57:29, trial factoring cutoff at 85 bits 11/09/21 10:57:29, ==== sieving started ( 4 threads) ==== 11/09/21 10:58:27, trial division touched 12767107 sieve locations out of 51825213440 11/09/21 10:58:27, total reports = 12767107, total surviving reports = 3209794 11/09/21 10:58:27, total blocks sieved = 1581580, avg surviving reports per block = 2.03 11/09/21 10:58:27, dlpecm: 1 failures, 211956 attempts, 1466779 outside range, 1303807 prp, 204221 useful 11/09/21 10:58:27, 50298 relations found: 19524 full + 30774 from 411949 partial, using 112970 polys (437 A polys) 11/09/21 10:58:27, on average, sieving found 3.82 rels/poly and 4377.39 rels/sec 11/09/21 10:58:27, trial division touched 12767107 sieve locations out of 51825213440 11/09/21 10:58:27, ==== post processing stage (msieve1.38) ==== 11/09/21 10:58:27, QS elapsed time = 98.5686 seconds. 11/09/21 10:58:28, begin singleton removal with 431473 relations 11/09/21 10:58:28, reduce to 94979 relations in 9 passes 11/09/21 10:58:29, recovered 94979 relations 11/09/21 10:58:29, recovered 64291 polynomials 11/09/21 10:58:29, attempting to build 50298 cycles 11/09/21 10:58:29, found 50298 cycles from 94979 relations in 4 passes 11/09/21 10:58:29, distribution of cycle lengths: 11/09/21 10:58:29, length 1 : 19524 11/09/21 10:58:29, length 2 : 14882 11/09/21 10:58:29, length 3 : 8517 11/09/21 10:58:29, length 4 : 4253 11/09/21 10:58:29, length 5 : 1830 11/09/21 10:58:29, length 6 : 768 11/09/21 10:58:29, length 7 : 322 11/09/21 10:58:29, length 9+: 202 11/09/21 10:58:29, largest cycle: 15 relations 11/09/21 10:58:29, matrix is 49712 x 50298 (9.2 MB) with weight 2012082 (40.00/col) 11/09/21 10:58:29, sparse part has weight 2012082 (40.00/col) 11/09/21 10:58:29, filtering completed in 4 passes 11/09/21 10:58:29, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 10:58:29, sparse part has weight 1648559 (41.17/col) 11/09/21 10:58:29, saving the first 48 matrix rows for later 11/09/21 10:58:29, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 10:58:29, sparse part has weight 1275284 (31.85/col) 11/09/21 10:58:29, matrix includes 64 packed rows 11/09/21 10:58:29, using block size 16017 for processor cache size 6144 kB 11/09/21 10:58:29, commencing Lanczos iteration 11/09/21 10:58:29, memory use: 5.5 MB 11/09/21 10:58:33, lanczos halted after 633 iterations (dim = 39928) 11/09/21 10:58:33, recovered 17 nontrivial dependencies 11/09/21 10:58:34, Lanczos elapsed time = 5.3160 seconds. 11/09/21 10:58:34, Sqrt elapsed time = 0.8240 seconds. 11/09/21 10:58:34, SIQS elapsed time = 104.7100 seconds. 11/09/21 10:58:34, [/CODE] At this point it tries again, with a different random seed [CODE]11/09/21 10:58:34, final ECM pretested depth: 0.00 11/09/21 10:58:34, scheduler: switching to sieve method 11/09/21 10:58:34, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 10:58:34, random seed: 16728249449343881367 11/09/21 10:58:54, ==== sieve params ==== 11/09/21 10:58:54, n = 82 digits, 273 bits 11/09/21 10:58:54, factor base: 49712 primes (max prime = 1290539) 11/09/21 10:58:54, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 10:58:54, double large prime range from 1665490910521 to 362485408947117 11/09/21 10:58:54, DLP MFB = 1.80 11/09/21 10:58:54, using AVX2 enabled 32k sieve core 11/09/21 10:58:54, sieve interval: 7 blocks of size 32768 11/09/21 10:58:54, polynomial A has ~ 10 factors 11/09/21 10:58:54, using multiplier of 29 11/09/21 10:58:54, using multiplier of 29 11/09/21 10:58:54, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 10:58:54, using SPV correction of 21 bits, starting at offset 34 11/09/21 10:58:54, trial factoring cutoff at 85 bits 11/09/21 10:58:54, ==== sieving started ( 4 threads) ==== 11/09/21 10:58:54, trial division touched 0 sieve locations out of 0 11/09/21 10:58:54, total reports = 0, total surviving reports = 0 11/09/21 10:58:54, total blocks sieved = 0, avg surviving reports per block = nan(ind) 11/09/21 10:58:54, dlpecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful 11/09/21 10:58:54, 50299 relations found: 19524 full + 30775 from 411950 partial, using 0 polys (1 A polys) 11/09/21 10:58:54, on average, sieving found inf rels/poly and 21100.86 rels/sec 11/09/21 10:58:54, trial division touched 0 sieve locations out of 0 11/09/21 10:58:54, ==== post processing stage (msieve1.38) ==== 11/09/21 10:58:54, QS elapsed time = 20.4612 seconds. 11/09/21 10:58:54, begin singleton removal with 431473 relations 11/09/21 10:58:54, reduce to 94980 relations in 9 passes 11/09/21 10:58:55, recovered 94980 relations 11/09/21 10:58:55, recovered 64292 polynomials 11/09/21 10:58:55, attempting to build 50298 cycles 11/09/21 10:58:55, found 50298 cycles from 94980 relations in 4 passes 11/09/21 10:58:55, distribution of cycle lengths: 11/09/21 10:58:55, length 1 : 19524 11/09/21 10:58:55, length 2 : 14882 11/09/21 10:58:55, length 3 : 8517 11/09/21 10:58:55, length 4 : 4253 11/09/21 10:58:55, length 5 : 1830 11/09/21 10:58:55, length 6 : 768 11/09/21 10:58:55, length 7 : 322 11/09/21 10:58:55, length 9+: 202 11/09/21 10:58:55, largest cycle: 15 relations 11/09/21 10:58:56, matrix is 49712 x 50298 (9.2 MB) with weight 2012093 (40.00/col) 11/09/21 10:58:56, sparse part has weight 2012093 (40.00/col) 11/09/21 10:58:56, filtering completed in 4 passes 11/09/21 10:58:56, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 10:58:56, sparse part has weight 1648559 (41.17/col) 11/09/21 10:58:56, saving the first 48 matrix rows for later 11/09/21 10:58:56, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 10:58:56, sparse part has weight 1275284 (31.85/col) 11/09/21 10:58:56, matrix includes 64 packed rows 11/09/21 10:58:56, using block size 16017 for processor cache size 6144 kB 11/09/21 10:58:56, commencing Lanczos iteration 11/09/21 10:58:56, memory use: 5.5 MB 11/09/21 10:58:59, lanczos halted after 633 iterations (dim = 39928) 11/09/21 10:58:59, recovered 17 nontrivial dependencies 11/09/21 10:59:00, Lanczos elapsed time = 5.2600 seconds. 11/09/21 10:59:00, Sqrt elapsed time = 0.7970 seconds. 11/09/21 10:59:00, SIQS elapsed time = 26.5175 seconds. 11/09/21 10:59:00, 11/09/21 10:59:00, 11/09/21 10:59:00, final ECM pretested depth: 0.00 11/09/21 10:59:00, scheduler: switching to sieve method 11/09/21 10:59:00, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 10:59:00, random seed: 3384743676930672059 11/09/21 10:59:21, ==== sieve params ==== 11/09/21 10:59:21, n = 82 digits, 273 bits 11/09/21 10:59:21, factor base: 49712 primes (max prime = 1290539) 11/09/21 10:59:21, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 10:59:21, double large prime range from 1665490910521 to 362485408947117 11/09/21 10:59:21, DLP MFB = 1.80 11/09/21 10:59:21, using AVX2 enabled 32k sieve core 11/09/21 10:59:21, sieve interval: 7 blocks of size 32768 11/09/21 10:59:21, polynomial A has ~ 10 factors 11/09/21 10:59:21, using multiplier of 29 11/09/21 10:59:21, using multiplier of 29 11/09/21 10:59:21, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 10:59:21, using SPV correction of 21 bits, starting at offset 34 11/09/21 10:59:21, trial factoring cutoff at 85 bits 11/09/21 10:59:21, ==== sieving started ( 4 threads) ==== 11/09/21 10:59:21, trial division touched 0 sieve locations out of 0 11/09/21 10:59:21, total reports = 0, total surviving reports = 0 11/09/21 10:59:21, total blocks sieved = 0, avg surviving reports per block = nan(ind) 11/09/21 10:59:21, dlpecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful 11/09/21 10:59:21, 50299 relations found: 19524 full + 30775 from 411950 partial, using 0 polys (1 A polys) 11/09/21 10:59:21, on average, sieving found inf rels/poly and 21060.69 rels/sec 11/09/21 10:59:21, trial division touched 0 sieve locations out of 0 11/09/21 10:59:21, ==== post processing stage (msieve1.38) ==== 11/09/21 10:59:21, QS elapsed time = 20.4872 seconds. 11/09/21 10:59:21, begin singleton removal with 431473 relations 11/09/21 10:59:21, reduce to 94980 relations in 9 passes 11/09/21 10:59:22, recovered 94980 relations 11/09/21 10:59:22, recovered 64292 polynomials 11/09/21 10:59:22, attempting to build 50298 cycles 11/09/21 10:59:22, found 50298 cycles from 94980 relations in 4 passes 11/09/21 10:59:22, distribution of cycle lengths: 11/09/21 10:59:22, length 1 : 19524 11/09/21 10:59:22, length 2 : 14882 11/09/21 10:59:22, length 3 : 8517 11/09/21 10:59:22, length 4 : 4253 11/09/21 10:59:22, length 5 : 1830 11/09/21 10:59:22, length 6 : 768 11/09/21 10:59:22, length 7 : 322 11/09/21 10:59:22, length 9+: 202 11/09/21 10:59:22, largest cycle: 15 relations 11/09/21 10:59:22, matrix is 49712 x 50298 (9.2 MB) with weight 2012093 (40.00/col) 11/09/21 10:59:22, sparse part has weight 2012093 (40.00/col) 11/09/21 10:59:22, filtering completed in 4 passes 11/09/21 10:59:22, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 10:59:22, sparse part has weight 1648559 (41.17/col) 11/09/21 10:59:22, saving the first 48 matrix rows for later 11/09/21 10:59:22, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 10:59:22, sparse part has weight 1275284 (31.85/col) 11/09/21 10:59:22, matrix includes 64 packed rows 11/09/21 10:59:22, using block size 16017 for processor cache size 6144 kB 11/09/21 10:59:23, commencing Lanczos iteration 11/09/21 10:59:23, memory use: 5.5 MB 11/09/21 10:59:26, lanczos halted after 633 iterations (dim = 39928) 11/09/21 10:59:26, recovered 17 nontrivial dependencies 11/09/21 10:59:27, Lanczos elapsed time = 5.3170 seconds. 11/09/21 10:59:27, Sqrt elapsed time = 0.7500 seconds. 11/09/21 10:59:27, SIQS elapsed time = 26.5545 seconds. 11/09/21 10:59:27, 11/09/21 10:59:27, 11/09/21 10:59:27, final ECM pretested depth: 0.00 11/09/21 10:59:27, scheduler: switching to sieve method 11/09/21 10:59:27, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 10:59:27, random seed: 3034725368991286559 11/09/21 10:59:47, ==== sieve params ==== 11/09/21 10:59:47, n = 82 digits, 273 bits 11/09/21 10:59:47, factor base: 49712 primes (max prime = 1290539) 11/09/21 10:59:47, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 10:59:47, double large prime range from 1665490910521 to 362485408947117 11/09/21 10:59:47, DLP MFB = 1.80 11/09/21 10:59:47, using AVX2 enabled 32k sieve core 11/09/21 10:59:47, sieve interval: 7 blocks of size 32768 11/09/21 10:59:47, polynomial A has ~ 10 factors 11/09/21 10:59:47, using multiplier of 29 11/09/21 10:59:47, using multiplier of 29 11/09/21 10:59:47, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 10:59:47, using SPV correction of 21 bits, starting at offset 34 11/09/21 10:59:47, trial factoring cutoff at 85 bits 11/09/21 10:59:47, ==== sieving started ( 4 threads) ==== 11/09/21 10:59:47, trial division touched 0 sieve locations out of 0 11/09/21 10:59:47, total reports = 0, total surviving reports = 0 11/09/21 10:59:47, total blocks sieved = 0, avg surviving reports per block = nan(ind) 11/09/21 10:59:47, dlpecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful 11/09/21 10:59:47, 50299 relations found: 19524 full + 30775 from 411950 partial, using 0 polys (1 A polys) 11/09/21 10:59:47, on average, sieving found inf rels/poly and 21098.80 rels/sec 11/09/21 10:59:47, trial division touched 0 sieve locations out of 0 11/09/21 10:59:47, ==== post processing stage (msieve1.38) ==== 11/09/21 10:59:47, QS elapsed time = 20.4502 seconds. 11/09/21 10:59:47, begin singleton removal with 431473 relations 11/09/21 10:59:48, reduce to 94980 relations in 9 passes 11/09/21 10:59:48, recovered 94980 relations 11/09/21 10:59:48, recovered 64292 polynomials 11/09/21 10:59:48, attempting to build 50298 cycles 11/09/21 10:59:48, found 50298 cycles from 94980 relations in 4 passes 11/09/21 10:59:48, distribution of cycle lengths: 11/09/21 10:59:48, length 1 : 19524 11/09/21 10:59:48, length 2 : 14882 11/09/21 10:59:48, length 3 : 8517 11/09/21 10:59:48, length 4 : 4253 11/09/21 10:59:48, length 5 : 1830 11/09/21 10:59:48, length 6 : 768 11/09/21 10:59:48, length 7 : 322 11/09/21 10:59:48, length 9+: 202 11/09/21 10:59:48, largest cycle: 15 relations 11/09/21 10:59:49, matrix is 49712 x 50298 (9.2 MB) with weight 2012093 (40.00/col) 11/09/21 10:59:49, sparse part has weight 2012093 (40.00/col) 11/09/21 10:59:49, filtering completed in 4 passes 11/09/21 10:59:49, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 10:59:49, sparse part has weight 1648559 (41.17/col) 11/09/21 10:59:49, saving the first 48 matrix rows for later 11/09/21 10:59:49, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 10:59:49, sparse part has weight 1275284 (31.85/col) 11/09/21 10:59:49, matrix includes 64 packed rows 11/09/21 10:59:49, using block size 16017 for processor cache size 6144 kB 11/09/21 10:59:49, commencing Lanczos iteration 11/09/21 10:59:49, memory use: 5.5 MB 11/09/21 10:59:52, lanczos halted after 633 iterations (dim = 39928) 11/09/21 10:59:52, recovered 17 nontrivial dependencies 11/09/21 10:59:53, Lanczos elapsed time = 5.2990 seconds. 11/09/21 10:59:53, Sqrt elapsed time = 0.8030 seconds. 11/09/21 10:59:53, SIQS elapsed time = 26.5515 seconds. 11/09/21 10:59:53, 11/09/21 10:59:53, 11/09/21 10:59:53, final ECM pretested depth: 0.00 11/09/21 10:59:53, scheduler: switching to sieve method 11/09/21 10:59:53, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 10:59:53, random seed: 8235070506173952707 11/09/21 11:00:14, ==== sieve params ==== 11/09/21 11:00:14, n = 82 digits, 273 bits 11/09/21 11:00:14, factor base: 49712 primes (max prime = 1290539) 11/09/21 11:00:14, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 11:00:14, double large prime range from 1665490910521 to 362485408947117 11/09/21 11:00:14, DLP MFB = 1.80 11/09/21 11:00:14, using AVX2 enabled 32k sieve core 11/09/21 11:00:14, sieve interval: 7 blocks of size 32768 11/09/21 11:00:14, polynomial A has ~ 10 factors 11/09/21 11:00:14, using multiplier of 29 11/09/21 11:00:14, using multiplier of 29 11/09/21 11:00:14, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 11:00:14, using SPV correction of 21 bits, starting at offset 34 11/09/21 11:00:14, trial factoring cutoff at 85 bits 11/09/21 11:00:14, ==== sieving started ( 4 threads) ==== 11/09/21 11:00:14, trial division touched 0 sieve locations out of 0 11/09/21 11:00:14, total reports = 0, total surviving reports = 0 11/09/21 11:00:14, total blocks sieved = 0, avg surviving reports per block = nan(ind) 11/09/21 11:00:14, dlpecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful 11/09/21 11:00:14, 50299 relations found: 19524 full + 30775 from 411950 partial, using 0 polys (1 A polys) 11/09/21 11:00:14, on average, sieving found inf rels/poly and 21075.09 rels/sec 11/09/21 11:00:14, trial division touched 0 sieve locations out of 0 11/09/21 11:00:14, ==== post processing stage (msieve1.38) ==== 11/09/21 11:00:14, QS elapsed time = 20.4742 seconds. 11/09/21 11:00:14, begin singleton removal with 431473 relations 11/09/21 11:00:14, reduce to 94980 relations in 9 passes 11/09/21 11:00:15, recovered 94980 relations 11/09/21 11:00:15, recovered 64292 polynomials 11/09/21 11:00:15, attempting to build 50298 cycles 11/09/21 11:00:15, found 50298 cycles from 94980 relations in 4 passes 11/09/21 11:00:15, distribution of cycle lengths: 11/09/21 11:00:15, length 1 : 19524 11/09/21 11:00:15, length 2 : 14882 11/09/21 11:00:15, length 3 : 8517 11/09/21 11:00:15, length 4 : 4253 11/09/21 11:00:15, length 5 : 1830 11/09/21 11:00:15, length 6 : 768 11/09/21 11:00:15, length 7 : 322 11/09/21 11:00:15, length 9+: 202 11/09/21 11:00:15, largest cycle: 15 relations 11/09/21 11:00:15, matrix is 49712 x 50298 (9.2 MB) with weight 2012093 (40.00/col) 11/09/21 11:00:15, sparse part has weight 2012093 (40.00/col) 11/09/21 11:00:15, filtering completed in 4 passes 11/09/21 11:00:15, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 11:00:15, sparse part has weight 1648559 (41.17/col) 11/09/21 11:00:15, saving the first 48 matrix rows for later 11/09/21 11:00:15, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 11:00:15, sparse part has weight 1275284 (31.85/col) 11/09/21 11:00:15, matrix includes 64 packed rows 11/09/21 11:00:15, using block size 16017 for processor cache size 6144 kB 11/09/21 11:00:16, commencing Lanczos iteration 11/09/21 11:00:16, memory use: 5.5 MB 11/09/21 11:00:19, lanczos halted after 633 iterations (dim = 39928) 11/09/21 11:00:19, recovered 17 nontrivial dependencies 11/09/21 11:00:20, Lanczos elapsed time = 5.1600 seconds. 11/09/21 11:00:20, Sqrt elapsed time = 0.8010 seconds. 11/09/21 11:00:20, SIQS elapsed time = 26.4345 seconds. 11/09/21 11:00:20, [/CODE] and so on. Having not found any more factors I stopped the process, then started it afresh with the C81. It immediately (well 27 seconds later) presented me with three beautiful bouncing factors. [CODE]11/09/21 11:13:26, 11/09/21 11:13:26, **************************** 11/09/21 11:13:26, Starting factorization of 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 11:13:26, using pretesting plan: noecm 11/09/21 11:13:26, no tune info: using qs/gnfs crossover of 95 digits 11/09/21 11:13:26, no tune info: using qs/snfs crossover of 75 digits 11/09/21 11:13:26, **************************** 11/09/21 11:13:26, starting SIQS on c81: 288456600260838603397898547740484692177664798616755193922608276433886354497755781 11/09/21 11:13:26, random seed: 8066514638846999927 11/09/21 11:13:47, ==== sieve params ==== 11/09/21 11:13:47, n = 82 digits, 273 bits 11/09/21 11:13:47, factor base: 49712 primes (max prime = 1290539) 11/09/21 11:13:47, single large prime cutoff: 122601205 (95 * pmax) 11/09/21 11:13:47, double large prime range from 1665490910521 to 362485408947117 11/09/21 11:13:47, DLP MFB = 1.80 11/09/21 11:13:47, using AVX2 enabled 32k sieve core 11/09/21 11:13:47, sieve interval: 7 blocks of size 32768 11/09/21 11:13:47, polynomial A has ~ 10 factors 11/09/21 11:13:47, using multiplier of 29 11/09/21 11:13:47, using multiplier of 29 11/09/21 11:13:47, using Q2(x) polynomials for kN mod 8 = 1 11/09/21 11:13:47, using SPV correction of 21 bits, starting at offset 34 11/09/21 11:13:47, trial factoring cutoff at 85 bits 11/09/21 11:13:47, ==== sieving started ( 4 threads) ==== 11/09/21 11:13:47, trial division touched 0 sieve locations out of 0 11/09/21 11:13:47, total reports = 0, total surviving reports = 0 11/09/21 11:13:47, total blocks sieved = 0, avg surviving reports per block = nan(ind) 11/09/21 11:13:47, dlpecm: 0 failures, 0 attempts, 0 outside range, 0 prp, 0 useful 11/09/21 11:13:47, 50299 relations found: 19524 full + 30775 from 411950 partial, using 0 polys (1 A polys) 11/09/21 11:13:47, on average, sieving found inf rels/poly and 20714.87 rels/sec 11/09/21 11:13:47, trial division touched 0 sieve locations out of 0 11/09/21 11:13:47, ==== post processing stage (msieve1.38) ==== 11/09/21 11:13:47, QS elapsed time = 20.8292 seconds. 11/09/21 11:13:47, begin singleton removal with 431473 relations 11/09/21 11:13:47, reduce to 94980 relations in 9 passes 11/09/21 11:13:48, recovered 94980 relations 11/09/21 11:13:48, recovered 64292 polynomials 11/09/21 11:13:48, attempting to build 50298 cycles 11/09/21 11:13:48, found 50298 cycles from 94980 relations in 4 passes 11/09/21 11:13:48, distribution of cycle lengths: 11/09/21 11:13:48, length 1 : 19524 11/09/21 11:13:48, length 2 : 14882 11/09/21 11:13:48, length 3 : 8517 11/09/21 11:13:48, length 4 : 4253 11/09/21 11:13:48, length 5 : 1830 11/09/21 11:13:48, length 6 : 768 11/09/21 11:13:48, length 7 : 322 11/09/21 11:13:48, length 9+: 202 11/09/21 11:13:48, largest cycle: 15 relations 11/09/21 11:13:48, matrix is 49712 x 50298 (9.2 MB) with weight 2012093 (40.00/col) 11/09/21 11:13:48, sparse part has weight 2012093 (40.00/col) 11/09/21 11:13:49, filtering completed in 4 passes 11/09/21 11:13:49, matrix is 39980 x 40044 (7.5 MB) with weight 1648559 (41.17/col) 11/09/21 11:13:49, sparse part has weight 1648559 (41.17/col) 11/09/21 11:13:49, saving the first 48 matrix rows for later 11/09/21 11:13:49, matrix is 39932 x 40044 (6.4 MB) with weight 1394921 (34.83/col) 11/09/21 11:13:49, sparse part has weight 1275284 (31.85/col) 11/09/21 11:13:49, matrix includes 64 packed rows 11/09/21 11:13:49, using block size 16017 for processor cache size 6144 kB 11/09/21 11:13:49, commencing Lanczos iteration 11/09/21 11:13:49, memory use: 5.5 MB 11/09/21 11:13:52, lanczos halted after 633 iterations (dim = 39928) 11/09/21 11:13:52, recovered 17 nontrivial dependencies 11/09/21 11:13:52, prp18 = 988178592293402021 11/09/21 11:13:53, prp19 = 1346028033112095481 11/09/21 11:13:53, prp45 = 216865733067462219031336345962688918881760681 11/09/21 11:13:53, Lanczos elapsed time = 5.6540 seconds. 11/09/21 11:13:53, Sqrt elapsed time = 0.3800 seconds. 11/09/21 11:13:53, SIQS elapsed time = 26.8635 seconds. 11/09/21 11:13:53, 11/09/21 11:13:53, 11/09/21 11:13:53, Total factoring time = 27.0275 seconds [/CODE] Sorry this is a bit long, but I thought someone might like to see what was going on. 
[B]bsquared[/B], is maximal digits count in version 2.07  c1020?

[QUOTE=thyrex;593611][B]bsquared[/B], is maximal digits count in version 2.07  c1020?[/QUOTE]
In theory, no, but plenty of weird stuff might happen with inputs near or larger than 1024 digits. Not a corner of the code I test very well. 
Strange error (0xc0000005) when using Studio Kamada poly
When I try to factor 78888_142 (from Studio Kamada's nearrepdigit tables), I get this crash:
[code]Faulting application name: yafu.exe, version: 0.0.0.0, time stamp: 0x611c3335 Faulting module name: yafu.exe, version: 0.0.0.0, time stamp: 0x611c3335 Exception code: 0xc0000005 Fault offset: 0x000000000015e3d9 Faulting process id: 0x1384 Faulting application start time: 0x01d7e15f4ab93ee3 Faulting application path: C:\Numbers\yafumaster\yafu.exe Faulting module path: C:\Numbers\yafumaster\yafu.exe Report Id: ceacc9fa05964f6da151a56041b94d89 Faulting package full name: Faulting packagerelative application ID: [/code]I used the poly that was supplied on the website, and put it in nfs.job: [URL]https://stdkmd.net/nrr/c.cgi?q=78888_142[/URL] Why is it crashing? Is there something wrong with the poly? The only thing that was output to factor.log was this: [code]11/24/21 13:15:42, nfs: commencing nfs on c137: 39628160596972006667354298974490180923204420136195848397615791252691924205059098424741546252872762571726970680519332067911281143827227471[/code]Here's what was output to the command prompt: [code]C:\Numbers\yafumaster>yafu "snfs(71*10^1428,39628160596972006667354298974490180923204420136195848397615791252691924205059098424741546252872762571726970680519332067911281143827227471)" Applying tune_info entry for WIN64  Intel(R) Core(TM) i59300H CPU @ 2.40GHz YAFU Version 2.06 Built with Microsoft Visual Studio 1922 Using GMPECM 7.0.4, Powered by MPIR 3.0.0 Detected Intel(R) Core(TM) i59300H CPU @ 2.40GHz Detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes Using 1 random witness for RabinMiller PRP checks Cached 664579 primes; max prime is 9999991 =============================================================== ======= Welcome to YAFU (Yet Another Factoring Utility) ======= ======= bbuhrow@gmail.com ======= ======= Type help at any time, or quit to quit ======= =============================================================== >> nfs: checking for job file  job file found, testing for matching input input from file = 39628160596972006667354298974490180923204420136195848397615791252691924205059098424741546252872762571726970680519332067911281143827227471 input to yafu = 709999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999992 input matches with multiple of 17916552 nfs: number in job file matches input nfs: checking for data file nfs: no data file found nfs: commencing nfs on c137: 39628160596972006667354298974490180923204420136195848397615791252691924205059098424741546252872762571726970680519332067911281143827227471 nfs: resumesieve; last_spq = 0, nfs_phases = 0 nfs: found m: 100000000000000000000000000000000000 nfs: found c[4]: 1775 nfs: found c[0]: 2 nfs: found skew: 0.180000 nfs: found type: snfs nfs: initializing snfs poly nfs: parsed lpbr = 26, lpba = 26 nfs: detected snfs job but no snfs difficulty nfs: using m and poly coefficients to compute difficulty nfs: snfs difficulty: 38.249198 nfs: checking degree 4 poly nfs: analyzing poly:[/code] 
The same with Linux binary (seg fault), but I got it worked when I didn't set initial poly and let YAFU choose it for me.
I think m param is a problem in autogenerated poly at Kamada's site. It works when I replace [CODE]m: 100000000000000000000000000000000000[/CODE] to [CODE]Y1: 1 Y0: 100000000000000000000000000000000000 [/CODE] 
Is there any way to check if a number that is inputted for factoring is already listed in the factored.dat file, and if so verify the listed factors and if they are valid automatically output them without starting the factoring from scratch?

Strange SIQSrelated crash. What's causing it?
Why does this number crash YAFU 2.06?
[code]72201646132199873461502083685639136119064441143576829474934045444051626750298129[/code]Here's the output to cmd: [code]C:\Numbers\yafumaster>yafu 72201646132199873461502083685639136119064441143576829474934045444051626750298129 Applying tune_info entry for WIN64  Intel(R) Core(TM) i59300H CPU @ 2.40GHz YAFU Version 2.06 Built with Microsoft Visual Studio 1922 Using GMPECM 7.0.4, Powered by MPIR 3.0.0 Detected Intel(R) Core(TM) i59300H CPU @ 2.40GHz Detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes Using 1 random witness for RabinMiller PRP checks Cached 664579 primes; max prime is 9999991 =============================================================== ======= Welcome to YAFU (Yet Another Factoring Utility) ======= ======= bbuhrow@gmail.com ======= ======= Type help at any time, or quit to quit ======= =============================================================== >> fac: factoring 72201646132199873461502083685639136119064441143576829474934045444051626750298129 fac: using pretesting plan: deep fac: using tune info for qs/gnfs crossover input from file = 2204163746040422113335335630634510483693477785822927479792844125899447775787592580144299824908196479 input to yafu = 72201646132199873461502083685639136119064441143576829474934045444051626750298129 div: primes less than 10000 fmt: 1000000 iterations 93%fmt: performed 23 perfect square checks rho: x^2 + 3, starting 1000 iterations on C80 rho: x^2 + 2, starting 1000 iterations on C80 rho: x^2 + 1, starting 1000 iterations on C80 nfs: searching for brent special forms... <snip> nfs: snfs form detection took 0.934170 seconds nfs: couldn't find special form pm1: starting B1 = 150K, B2 = gmpecm default on C80 pm1: Process took 0.0170 seconds. pm1: found c36 factor = 256618303712888684191205903598313519 fac: setting target pretesting digits to 15.00 fac: estimated sum of completed work is t0.00 fac: work done at B1=2000: 0 curves, max work = 30 curves fac: 30 more curves at B1=2000 needed to get to t15.00 Composite result found, starting refactorization fac: factoring 256618303712888684191205903598313519 fac: using pretesting plan: normal fac: no tune info: using qs/gnfs crossover of 95 digits fac: no tune info: using qs/snfs crossover of 75 digits div: primes less than 10000 fmt: 1000000 iterations rho: x^2 + 3, starting 1000 iterations on C36 rho: x^2 + 2, starting 1000 iterations on C36 rho: x^2 + 1, starting 1000 iterations on C36 starting SIQS on c36: 256618303712888684191205903598313519 C:\Numbers\yafumaster>[/code]factor.log: [code]01/11/22 17:09:26, 01/11/22 17:09:26, **************************** 01/11/22 17:09:26, Starting factorization of 72201646132199873461502083685639136119064441143576829474934045444051626750298129 01/11/22 17:09:26, using pretesting plan: deep 01/11/22 17:09:26, using tune info for qs/gnfs crossover 01/11/22 17:09:26, **************************** 01/11/22 17:09:26, rho: x^2 + 3, starting 1000 iterations on C80 01/11/22 17:09:26, rho: x^2 + 2, starting 1000 iterations on C80 01/11/22 17:09:26, rho: x^2 + 1, starting 1000 iterations on C80 01/11/22 17:09:27, pm1: starting B1 = 150K, B2 = gmpecm default on C80 01/11/22 17:09:27, c36 = 256618303712888684191205903598313519 01/11/22 17:09:27, current ECM pretesting depth: 0.00 01/11/22 17:09:27, scheduled 30 curves at B1=2000 toward target pretesting depth of 15.00 01/11/22 17:09:27, prp45 = 281358130295261309435186241678306806768864191 01/11/22 17:09:27, 01/11/22 17:09:27, **************************** 01/11/22 17:09:27, Starting factorization of 256618303712888684191205903598313519 01/11/22 17:09:27, using pretesting plan: normal 01/11/22 17:09:27, no tune info: using qs/gnfs crossover of 95 digits 01/11/22 17:09:27, no tune info: using qs/snfs crossover of 75 digits 01/11/22 17:09:27, **************************** 01/11/22 17:09:27, rho: x^2 + 3, starting 1000 iterations on C36 01/11/22 17:09:27, rho: x^2 + 2, starting 1000 iterations on C36 01/11/22 17:09:27, rho: x^2 + 1, starting 1000 iterations on C36 01/11/22 17:09:27, final ECM pretested depth: 0.00 01/11/22 17:09:27, scheduler: switching to sieve method 01/11/22 17:09:27, starting SIQS on c36: 256618303712888684191205903598313519 01/11/22 17:09:27, random seed: 3836357694855539672 [/code]Error message (Event Viewer): [code]Faulting application name: yafu.exe, version: 0.0.0.0, time stamp: 0x611c3335 Faulting module name: yafu.exe, version: 0.0.0.0, time stamp: 0x611c3335 Exception code: 0xc0000005 Fault offset: 0x000000000000be19 Faulting process id: 0x27fc Faulting application start time: 0x01d80737e57dff6c Faulting application path: C:\Numbers\yafumaster\yafu.exe Faulting module path: C:\Numbers\yafumaster\yafu.exe Report Id: dfd85e6a3fcc4269b47ca3f8a2a1eece Faulting package full name: Faulting packagerelative application ID: [/code] 
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