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Old 2018-03-04, 16:43   #441
chris2be8
 
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I think I know what's going on.

First run on that number:
Code:
~/bin> yafu "factor(1892736541092856191985016290123418764325)"


fac: factoring 1892736541092856191985016290123418764325
fac: using pretesting plan: normal
fac: using tune info for qs/gnfs crossover
div: primes less than 10000
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
pm1: starting B1 = 150K, B2 = gmp-ecm default on C36
ecm: 30/30 curves on C36, B1=2K, B2=gmp-ecm default

starting SIQS on c36: 577934821707742348697714897747608783

==== sieving in progress (1 thread):     432 relations needed ====
====           Press ctrl-c to abort and save state           ====
358 rels found: 184 full + 174 from 1625 partial, (23780.10 rels/sec)

SIQS elapsed time = 0.1110 seconds.
Total factoring time = 0.3386 seconds


***factors found***

P1 = 5
P1 = 5
P3 = 131
P14 = 20361010444661
P23 = 28384388057680437786803

ans = 1
Second run:
Code:
~/bin> yafu "factor(1892736541092856191985016290123418764325)"


fac: factoring 1892736541092856191985016290123418764325
fac: using pretesting plan: normal
fac: using tune info for qs/gnfs crossover

starting SIQS on c36: 577934821707742348697714897747608783

==== sieving in progress (1 thread):     432 relations needed ====
====           Press ctrl-c to abort and save state           ====


SIQS elapsed time = 0.0694 seconds.
Total factoring time = 0.0728 seconds


***factors found***

P23 = 28384388057680437786803
P14 = 20361010444661

ans = 1
And after adding -v on the end:
Code:
~/bin> yafu "factor(1892736541092856191985016290123418764325)" -v


03/04/18 17:47:52 v1.34.5 @ linux-5hwg, System/Build Info:
Using GMP-ECM 6.4.4, Powered by GMP 5.1.1
detected AMD Athlon(tm) II X2 240 Processor
detected L1 = 65536 bytes, L2 = 1048576 bytes, CL = 64 bytes
measured cpu frequency ~= 2800.027300
using 20 random witnesses for Rabin-Miller PRP checks

===============================================================
======= Welcome to YAFU (Yet Another Factoring Utility) =======
=======             bbuhrow@gmail.com                   =======
=======     Type help at any time, or quit to quit      =======
===============================================================
cached 78498 primes. pmax = 999983


>> fac: factoring 1892736541092856191985016290123418764325
fac: using pretesting plan: normal
fac: using tune info for qs/gnfs crossover
fac: found siqs savefile, resuming siqs

starting SIQS on c36: 577934821707742348697714897747608783
436 relations found: 207 full + 229 from 1820 partial
threw away 0 relations with large primes too small

==== sieve params ====
n = 37 digits, 121 bits
factor base: 368 primes (max prime = 6287)
single large prime cutoff: 314350 (50 * pmax)
using SSE2 enabled 32k sieve core
sieve interval: 1 blocks of size 32768
polynomial A has ~ 4 factors
using multiplier of 3
using SPV correction of 20 bits, starting at offset 30
using SSE2 for x32 sieve scanning
using SSE2 for resieving 13-16 bit primes
using SSE2 for 8x trial divison to 13 bits
using SSE2 and inline ASM for small prime sieving
using SSE2 for poly updating up to 15 bits
using SSE2 and inline ASM for large prime poly updating
trial factoring cutoff at 31 bits

==== sieving in progress (1 thread):     432 relations needed ====
====           Press ctrl-c to abort and save state           ====


sieving required 0 total polynomials
trial division touched 0 sieve locations out of 0
QS elapsed time = 0.0359 seconds.

==== post processing stage (msieve-1.38) ====
begin with 2026 relations
reduce to 641 relations in 2 passes
attempting to read 641 relations
recovered 641 relations
recovered 191 polynomials
freed 6 duplicate relations
attempting to build 429 cycles
found 429 cycles in 1 passes
distribution of cycle lengths:
   length 1 : 206
   length 2 : 223
largest cycle: 2 relations
matrix is 368 x 429 (0.0 MB) with weight 7376 (17.19/col)
sparse part has weight 7376 (17.19/col)
filtering completed in 2 passes
matrix is 355 x 419 (0.0 MB) with weight 7147 (17.06/col)
sparse part has weight 7147 (17.06/col)
commencing Lanczos iteration
memory use: 0.1 MB
lanczos halted after 7 iterations (dim = 350)
recovered 62 nontrivial dependencies
Lanczos elapsed time = 0.0200 seconds.
Sqrt elapsed time = 0.0000 seconds.
SIQS elapsed time = 0.0597 seconds.
pretesting / qs ratio was 0.00
Total factoring time = 0.0632 seconds


***factors found***

P23 = 28384388057680437786803
P14 = 20361010444661

ans = 1
In a directory that doesn't have a siqs.dat file left over from earlier work it works as expected.

Chris
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Old 2018-03-04, 16:49   #442
Dubslow
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Hehe, thanks for clearing that up.

I guess I'd argue that's still a bug in the code that prints what, because resumed or not, Yafu should print every factor of the input.

Last fiddled with by Dubslow on 2018-03-04 at 16:51
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Old 2018-03-04, 16:59   #443
chris2be8
 
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Further experiments show it depends on what is in siqs.dat. But after deleting the siqs.dat that caused the problem I can't make it happen again. An empty file doesn't cause the problem, nor does one from a C71. So save the one you have in case bsquared wants to look at it.

Chris
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Old 2018-03-05, 19:00   #444
bsquared
 
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Thanks for the report and investigative work. I vaguely remember this coming up before, but obviously whether it did or not it is still an "issue". I hesitate to call it a bug because it looks as if for a factorization to "fail" it must first be successfully factored

But I concede that the goal of factor() to always completely reduce an input to its prime or PRP factors is not quite held up...

Anyway. Adding an extra '-v' give some additional info:

Code:
./yafu "factor(1892736541092856191985016290123418764325)" -v -v
<snip>
fac: factoring 1892736541092856191985016290123418764325
fac: using pretesting plan: normal
fac: using tune info for qs/gnfs crossover
input from file = 577934821707742348697714897747608783
input to yafu = 1892736541092856191985016290123418764325
input matches with multiple of 3275
fac: found siqs savefile, resuming siqs
input from file = 577934821707742348697714897747608783
input to yafu = 577934821707742348697714897747608783
input matches with multiple of 1

starting SIQS on c36: 577934821707742348697714897747608783
<snip>
So both factor() and siqs() check for savefiles. For some reason I had factor() strip out the part of the input that wasn't in the savefile, while siqs() instead puts it back into the factor list whence it is eventually re-factored. Commenting out the offending lines (factor_common.c: 2341 thru 2344) I get the following behavior when a siqs savefile exists for the input 577934821707742348697714897747608783 = 1892736541092856191985016290123418764325 / 3275)

Code:
./yafu "factor(1892736541092856191985016290123418764325)" -v -v

<snip>

fac: factoring 1892736541092856191985016290123418764325
fac: using pretesting plan: normal
fac: using tune info for qs/gnfs crossover
input from file = 577934821707742348697714897747608783
input to yafu = 1892736541092856191985016290123418764325
input matches with multiple of 3275
fac: found siqs savefile, resuming siqs
input from file = 577934821707742348697714897747608783
input to yafu = 1892736541092856191985016290123418764325
input matches with multiple of 3275

starting SIQS on c36: 577934821707742348697714897747608783

<snip>

restarting siqs from saved data set
470 relations found: 229 full + 241 from 1991 partial

<snip>

SIQS elapsed time = 0.0572 seconds.
pretesting / qs ratio was 0.00

Composite result found, starting re-factorization
fac: factoring 3275
fac: using pretesting plan: normal
fac: no tune info: using qs/gnfs crossover of 95 digits
input from file = 577934821707742348697714897747608783
input to yafu = 3275
div: primes less than 10000
div: found prime factor = 5
div: found prime factor = 5
div: found prime factor = 131
Total factoring time = 0.0051 seconds
Total factoring time = 0.0771 seconds


***factors found***

P14 = 20361010444661
P23 = 28384388057680437786803
P1 = 5
P1 = 5
P3 = 131
Running siqs() with the same input, without a previous savefile, also produces a complete factorization because a small amount of trial division is done prior to starting siqs. However running siqs() with the same input, with a previous savefile, gives this result:
Code:
***factors found***

C4 = 3275
P14 = 20361010444661
P23 = 28384388057680437786803
Because the factor 3275 is placed into the refactorization queue, which never runs because we used siqs() instead of factor(). Since siqs() should only be used if you know for sure that your input has no small factors, I don't think this is a problem.


TL;DR:
I think removing lines 2341 thru 2344 of factor_common.c does the trick.
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Old 2018-06-15, 18:13   #445
Stargate38
 
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Question Can't run SNFS on this number...

Why does this crash YAFU?

Code:
yafu "snfs(30183455840218078252632188434545832773141433^5-1,1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681)"
I've also tried just this:

Code:
yafu "nfs(30183455840218078252632188434545832773141433^5-1)"
SNFS poly (from myfactors.mooo.com):

Code:
# 30183455840218078252632188434545832773141433 ^ 5 - 1
# MurphyE Score: 8.923e-11 anorm: 2.456e30 rnorm: 5.063e50. (Since rnorm is larger, sieve with the "-r" parameter.)
# SNFS difficulty is 173.919 which is approximately equivalent to GNFS difficulty 127. (Since n has 151 digits, it's recommended to use SNFS.)
# (some extra msieve library info) size: 8.301e-18 alpha: 1.694 rroots: 0
n: 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
skew: 1.84607
type: snfs
c4: 1
c3: 1
c2: 1
c1: 1
c0: 1
Y1: 1
Y0: -30183455840218078252632188434545832773141433
m: 30183455840218078252632188434545832773141433
rlambda: 2.5
alambda: 2.5
lpbr: 27
lpba: 27
mfbr: 54
mfba: 54
alim: 7800000
rlim: 7800000
qintsize: 40000
Event Viewer output:

Code:
Faulting application name: yafu.exe, version: 0.0.0.0, time stamp: 0x5137c9fa
Faulting module name: yafu.exe, version: 0.0.0.0, time stamp: 0x5137c9fa
Exception code: 0xc0000005 (Access Violation)
Fault offset: 0x0000000000067711
Faulting process id: 0x1644
Faulting application start time: 0x01d404d362301277
Faulting application path: C:\Users\username\Desktop\Sequences\Yafu\yafu.exe
Faulting module path: C:\Users\username\Desktop\Sequences\Yafu\yafu.exe
Report Id: 0de18567-2b18-4cf7-abb7-196b56a09c86
Faulting package full name: 
Faulting package-relative application ID:
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Old 2018-06-15, 19:03   #446
paulunderwood
 
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I know nothing about yafu/nfs/snfs.

Code:
n=(30183455840218078252632188434545832773141433^5-1)/(30183455840218078252632188434545832773141433-1)/41/1321/51773251/255933183791
1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
The cofactor is 151 digits long. Is it worth trying some ECM first?
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Old 2018-06-20, 17:14   #447
VictordeHolland
 
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Default Seems to work just fine?

Quote:
Originally Posted by Stargate38 View Post
Why does this crash YAFU?

Code:
yafu "snfs(30183455840218078252632188434545832773141433^5-1,1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681)"
I've also tried just this:

Code:
yafu "nfs(30183455840218078252632188434545832773141433^5-1)"
SNFS poly (from myfactors.mooo.com)
Seems to work just fine here?


Terminal output:
Code:
06/20/18 18:58:56 v1.35-beta @ PCVICTOR, System/Build Info:
Using GMP-ECM 7.0.4, Powered by GMP 6.1.2
detected        Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
detected L1 = 32768 bytes, L2 = 6291456 bytes, CL = 64 bytes
measured cpu frequency ~= 3471.979560
using 1 random witnesses for Rabin-Miller PRP checks

===============================================================
======= Welcome to YAFU (Yet Another Factoring Utility) =======
=======             bbuhrow@gmail.com                   =======
=======     Type help at any time, or quit to quit      =======
===============================================================
cached 78498 primes. pmax = 999983


>> snfs(30183455840218078252632188434545832773141433^5-1, 11565306328412519432899469497476480729549467445469289583035459
62083759807084826471590264662705430115778666821858556445025271356796697745531361965874681)

nfs: commencing nfs on c218: 2505213902481680039135352269626883864206317631558486358765743956739658122055719026372132070
156295113290828295964551449904950265354542233726668563985664318145086390468386139187641314110704857334906718818291187471
5482392
nfs: searching for brent special forms...
nfs: commencing rational side lattice sieving over range: 4733375 - 4761375
nfs: commencing rational side lattice sieving over range: 4705375 - 4733375
total yield: 54543, q=4761397 (0.01254 sec/rel)
total yield: 55121, q=4733381 (0.01250 sec/rel)
nfs: commencing rational side lattice sieving over range: 4789375 - 4817375
nfs: commencing rational side lattice sieving over range: 4761375 - 4789375
The poly YAFU makes/uses (nfs.job)
Code:
n: 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
# 30183455840218078252632188434545832773141433^5-1, difficulty: 173.92, anorm: 5.00e+024, rnorm: 3.02e+049
# scaled difficulty: 178.05, suggest sieving rational side
# size = 8.301e-018, alpha = 0.000, combined = 8.748e-011, rroots = 0
type: snfs
size: 173
skew: 1.0000
c4: 1
c3: 1
c2: 1
c1: 1
c0: 1
Y1: -1
Y0: 30183455840218078252632188434545832773141433
m: 30183455840218078252632188434545832773141433
rlim: 9410751
alim: 7477849
lpbr: 28
lpba: 27
mfbr: 56
mfba: 54
rlambda: 2.5
 alambda: 2.5

factor.log
Code:
06/20/18 18:59:35 v1.35-beta @ PCVICTOR, nfs: commencing nfs on c218: 25052139024816800391353522696268838642063176315584863587657439567396581220557190263721320701562951132908282959645514499049502653545422337266685639856643181450863904683861391876413141107048573349067188182911874715482392
06/20/18 18:59:35 v1.35-beta @ PCVICTOR, nfs: input divides 30183455840218078252632188434545832773141433^5 - 1
06/20/18 18:59:35 v1.35-beta @ PCVICTOR, nfs: using supplied cofactor: 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
06/20/18 18:59:35 v1.35-beta @ PCVICTOR, nfs: commencing snfs on c151: 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
06/20/18 18:59:35 v1.35-beta @ PCVICTOR, nfs: commencing lattice sieving with 2 threads

Last fiddled with by VictordeHolland on 2018-06-20 at 17:15
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Old 2018-06-20, 18:38   #448
VictordeHolland
 
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"Victor de Hollander"
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Or alternatively make a .poly file with your poly in it:


for instance: c151.poly

Code:
n: 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681
type: snfs
size: 173
skew: 1.84607
c4: 1
c3: 1
c2: 1
c1: 1
c0: 1
Y1: 1
Y0: -30183455840218078252632188434545832773141433
m: 30183455840218078252632188434545832773141433
alim: 7800000
rlim: 7800000
lpbr: 27
lpba: 27
mfbr: 54
mfba: 54
rlambda: 2.5
alambda: 2.5
and start with:

Code:
yafu-r373-win64-core2.exe "snfs(30183455840218078252632188434545832773141433^5-1, 1156530632841251943289946949747648072954946744546928958303545962083759807084826471590264662705430115778666821858556445025271356796697745531361965874681)" -v -R -ns -r -nc -job c151.poly
Code:
06/20/18 20:22:40 v1.35-beta @ PCVICTOR, System/Build Info:
Using GMP-ECM 7.0.4, Powered by GMP 6.1.2
detected        Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
detected L1 = 32768 bytes, L2 = 6291456 bytes, CL = 64 bytes
measured cpu frequency ~= 3371.586330
using 1 random witnesses for Rabin-Miller PRP checks

===============================================================
======= Welcome to YAFU (Yet Another Factoring Utility) =======
=======             bbuhrow@gmail.com                   =======
=======     Type help at any time, or quit to quit      =======
===============================================================
cached 78498 primes. pmax = 999983


>> nfs: checking for job file - job file found, testing for matching input
nfs: number in job file matches input
nfs: checking for data file
nfs: no data file found
nfs: commencing nfs on c151: 115653063284125194328994694974764807295494674454692
89583035459620837598070848264715902646627054301157786668218585564450252713567966
97745531361965874681
nfs: resumesieve; last_spq = 0, nfs_phases = 30
nfs: found type: snfs
nfs: found size: 173
nfs: parsed lpbr = 27, lpba = 27
nfs: guessing snfs difficulty 173 is roughly equal to gnfs difficulty 126
nfs: creating ggnfs job parameters for input of size 126
nfs: continuing with sieving - could not determine last special q; using default
 startq
nfs: commencing rational side lattice sieving over range: 3936000 - 3948000
nfs: commencing rational side lattice sieving over range: 3924000 - 3936000
nfs: commencing rational side lattice sieving over range: 3900000 - 3912000
nfs: commencing rational side lattice sieving over range: 3912000 - 3924000
gnfs-lasieve4I13e (with asm64): L1_BITS=15, SVN $Revision$
Warning:  lowering FB_bound to 3935999.
gnfs-lasieve4I13e (with asm64): L1_BITS=15, SVN $Revision$
Warning:  lowering FB_bound to 3923999.
gnfs-lasieve4I13e (with asm64): L1_BITS=15, SVN $Revision$
Warning:  lowering FB_bound to 3899999.
gnfs-lasieve4I13e (with asm64): L1_BITS=15, SVN $Revision$
Warning:  lowering FB_bound to 3911999.
FBsize 527057+0 (deg 4), 278177+0 (deg 1)
FBsize 527057+0 (deg 4), 278976+0 (deg 1)
FBsize 527057+0 (deg 4), 276610+0 (deg 1)
FBsize 527057+0 (deg 4), 277400+0 (deg 1)
total yield: 15667, q=3924017 (0.01989 sec/rel) ETA 0h00m)
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Old 2018-06-25, 15:02   #449
EdH
 
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"Ed Hall"
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Default

This is just for interest. It is not hindering anything. I have noticed this error on occasion, with previous versions of the packages, but never in this quantity. Usually, I see two at most:
Code:
starting SIQS on c85: 5143113629574483495855967737946298791368531952802701697537421992358384516615476732893

==== sieving in progress (  4 threads):   61392 relations needed ====
====             Press ctrl-c to abort and save state            ====
62235 rels found: 19040 full + 43195 from 705902 partial, (4270.57 rels/sec)

error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
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error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
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error Q != RHS
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error Q != RHS
error Q != RHS
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error Q != RHS
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error Q != RHS
error Q != RHS
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error Q != RHS
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error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
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error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
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error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
SIQS elapsed time = 188.8855 seconds.
Total factoring time = 214.1833 seconds


***factors found***

P31 = 1701965432471127970483064641723
*****
P55 = 3021867266779362709987755449274503675175052335457310791
*****
1
Msieve is r1022 and YAFU is r375 (wip). Here is YAFU's header:

Code:
06/25/18 10:50:55 v1.35-beta @ math64, System/Build Info: 
Using GMP-ECM 7.0.5-dev, Powered by GMP 6.1.2
detected AMD Phenom(tm) II X4 B95 Processor
detected L1 = 65536 bytes, L2 = 6291456 bytes, CL = 64 bytes
measured cpu frequency ~= 2992.507740
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Old 2018-06-25, 15:15   #450
bsquared
 
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"Ben"
Feb 2007

D4C16 Posts
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Quote:
Originally Posted by EdH View Post
This is just for interest. It is not hindering anything. I have noticed this error on occasion, with previous versions of the packages, but never in this quantity. Usually, I see two at most:
Code:
starting SIQS on c85: 5143113629574483495855967737946298791368531952802701697537421992358384516615476732893

==== sieving in progress (  4 threads):   61392 relations needed ====
====             Press ctrl-c to abort and save state            ====
62235 rels found: 19040 full + 43195 from 705902 partial, (4270.57 rels/sec)

error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
error Q != RHS
SIQS elapsed time = 188.8855 seconds.
Total factoring time = 214.1833 seconds


***factors found***

P31 = 1701965432471127970483064641723
*****
P55 = 3021867266779362709987755449274503675175052335457310791
*****
1
Msieve is r1022 and YAFU is r375 (wip). Here is YAFU's header:

Code:
06/25/18 10:50:55 v1.35-beta @ math64, System/Build Info: 
Using GMP-ECM 7.0.5-dev, Powered by GMP 6.1.2
detected AMD Phenom(tm) II X4 B95 Processor
detected L1 = 65536 bytes, L2 = 6291456 bytes, CL = 64 bytes
measured cpu frequency ~= 2992.507740
That confirms my suspicion that those messages had increased in frequency. It happens before the final cycles are built, so as long as things are oversieved enough (which they typically are) they should be benign. But, I can try to track down what is causing it. Let me know if it starts to cause problems.
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Old 2018-06-26, 16:20   #451
EdH
 
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"Ed Hall"
Dec 2009
Adirondack Mtns

2·19·97 Posts
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Quote:
Originally Posted by bsquared View Post
That confirms my suspicion that those messages had increased in frequency. It happens before the final cycles are built, so as long as things are oversieved enough (which they typically are) they should be benign. But, I can try to track down what is causing it. Let me know if it starts to cause problems.
If I happen to see a failure, I'l let you know, but the truth is I only happened on this one and a few earlier single/doubles when checking that machines are running with newer compiles. Normally, if a YAFU failure occurs, another composite is loaded and everything scrolls away pretty quick. Then, again, I have a lot of new compiling to do to catch up...


Thanks for all...

Last fiddled with by EdH on 2018-06-26 at 16:20
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