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Old 2020-05-15, 13:51   #8
charybdis
 
Apr 2020

22·33 Posts
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The c170 from Aliquot 3366 has built a matrix:

Code:
Fri May 15 13:30:04 2020  Msieve v. 1.54 (SVN 1030M)
Fri May 15 13:30:04 2020  random seeds: 85bae23a bde7ff6e
Fri May 15 13:30:04 2020  factoring 86631352523777317443318741611426541309296773170541288874048777015161155735273728068286738505405324469613265780485465094938752555194870805288145702027767872412047031948633 (170 digits)
Fri May 15 13:30:05 2020  searching for 15-digit factors
Fri May 15 13:30:05 2020  commencing number field sieve (170-digit input)
Fri May 15 13:30:05 2020  R0: -997917629737604869042704488941047
Fri May 15 13:30:05 2020  R1: 2231945554206892494565181
Fri May 15 13:30:05 2020  A0: 8911247040789664012374838655454593624736
Fri May 15 13:30:05 2020  A1: 58966576361359993167845008084069822
Fri May 15 13:30:05 2020  A2: -14226780425800550539646724351
Fri May 15 13:30:05 2020  A3: -1607926381901953698037
Fri May 15 13:30:05 2020  A4: 79303929919170
Fri May 15 13:30:05 2020  A5: 2457000
Fri May 15 13:30:05 2020  skew 1.00, size 1.375e-16, alpha -8.660, combined = 2.335e-15 rroots = 5
Fri May 15 13:30:05 2020  
Fri May 15 13:30:05 2020  commencing relation filtering
Fri May 15 13:30:05 2020  setting target matrix density to 100.0
Fri May 15 13:30:05 2020  estimated available RAM is 15845.9 MB
Fri May 15 13:30:05 2020  commencing duplicate removal, pass 1
...
Fri May 15 13:50:46 2020  found 59360613 hash collisions in 213148587 relations
Fri May 15 13:51:08 2020  commencing duplicate removal, pass 2
Fri May 15 13:55:12 2020  found 75754247 duplicates and 137394340 unique relations
...
Fri May 15 14:40:19 2020  matrix is 10495776 x 10496000 (4191.2 MB) with weight 1118174547 (106.53/col)
Fri May 15 14:40:19 2020  sparse part has weight 993750449 (94.68/col)
Fri May 15 14:40:19 2020  using block size 8192 and superblock size 884736 for processor cache size 9216 kB
Fri May 15 14:40:46 2020  commencing Lanczos iteration (6 threads)
Fri May 15 14:40:46 2020  memory use: 3956.9 MB
Fri May 15 14:41:08 2020  linear algebra at 0.0%, ETA 40h11m
This took 23.3M CPU-seconds of sieving with parameters
Code:
tasks.I = 14
tasks.qmin = 7000000
tasks.lim0 = 50000000
tasks.lim1 = 70000000
tasks.lpb0 = 31
tasks.lpb1 = 32
tasks.sieve.mfb0 = 58
tasks.sieve.mfb1 = 60
tasks.sieve.lambda0 = 1.85
tasks.sieve.lambda1 = 1.85
tasks.sieve.ncurves0 = 20
tasks.sieve.ncurves1 = 25
I've seen somewhere that sieve time should double every 5.5 digits, in which case this is still a bit slower than we'd like based on the timings at c177/8.

I'll do 95^128+1 next; Chris, do I need to reserve this somewhere? As for parameters, should I maybe try A=28 instead of I=14 and keep everything else the same?
charybdis is offline   Reply With Quote