20151206, 06:46  #1 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1110000110101_{2} Posts 
Weird
I have no idea idea what happened. I was running 2 instances of yafu running ecm, 4 threads per instance (one per virtual core on my 4C/8T box). Judging by what top says, 1) ecms were still running 2) yafu processes no longer exist, and 3) apparently I've had an mprime stress test running for a couple days without me realizing. No idea what could have caused yafu to segfault. Each instance had been running on and off for several days. 
20151206, 15:43  #2 
"Mike"
Aug 2002
2^{4}×499 Posts 

20151206, 16:33  #3 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3×29×83 Posts 
I had long since killed the terminal it was attached to, so I have no idea ¯\_(ツ)_/¯
Last fiddled with by Dubslow on 20151206 at 16:36 
20151213, 19:16  #4 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1C35_{16} Posts 
I dunno what happened here either
Code:
12/13/15 13:13:28 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.291260 using 1 random witnesses for RabinMiller 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 683509658968527731933622752985399562089096898268293040630316956386386417439445053536877531447746414645131905288219952920884031 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 C126 rho: x^2 + 2, starting 1000 iterations on C126 rho: x^2 + 1, starting 1000 iterations on C126 nfs: searching for brent special forms... nfs: searching for homogeneous cunningham special forms... nfs: searching for XYYXF special forms... nfs: couldn't find special form pm1: starting B1 = 150K, B2 = gmpecm default on C126 fac: setting target pretesting digits to 38.77 fac: 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 t38.77 ecm: 8/32 curves on C126, B1=2K, B2=gmpecm default ecm: found prp13 factor = 1441605704251 fac: setting target pretesting digits to 35.08 fac: t15: 0.53 fac: t20: 0.02 fac: sum of completed work is t0.00 fac: work done at B1=2000: 16 curves, max work = 30 curves fac: 14 more curves at B1=2000 needed to get to t35.08 ecm: 16/16 curves on C114, B1=2K, B2=gmpecm default fac: setting target pretesting digits to 35.08 fac: t15: 1.07 fac: t20: 0.04 fac: sum of completed work is t15.19 fac: work done at B1=11000: 0 curves, max work = 74 curves fac: 74 more curves at B1=11000 needed to get to t35.08 ecm: 80/80 curves on C114, B1=11K, B2=gmpecm default fac: setting target pretesting digits to 35.08 fac: t15: 7.73 fac: t20: 1.12 fac: t25: 0.05 fac: sum of completed work is t20.26 fac: work done at B1=50000: 0 curves, max work = 214 curves fac: 214 more curves at B1=50000 needed to get to t35.08 ecm: 24/216 curves on C114, B1=50K, B2=gmpecm default, ETA: 8 sec ecm: found prp22 factor = 5900468172414244198531 fac: setting target pretesting digits to 28.31 fac: t15: 12.30 fac: t20: 2.64 fac: t25: 0.20 fac: t30: 0.01 fac: sum of completed work is t21.01 fac: work done at B1=50000: 32 curves, max work = 214 curves fac: 182 more curves at B1=50000 needed to get to t28.31 ecm: 184/184 curves on C92, B1=50K, B2=gmpecm default, ETA: 0 sec pm1: starting B1 = 3750K, B2 = gmpecm default on C92 fac: setting target pretesting digits to 28.31 fac: t15: 38.59 fac: t20: 11.40 fac: t25: 1.06 fac: t30: 0.07 fac: sum of completed work is t25.34 fac: work done at B1=250000: 0 curves, max work = 430 curves fac: 256 more curves at B1=250000 needed to get to t28.31 ecm: 256/256 curves on C92, B1=250K, B2=gmpecm default, ETA: 1 sec fac: setting target pretesting digits to 28.31 fac: t15: 89.79 fac: t20: 43.40 fac: t25: 6.18 fac: t30: 0.66 fac: t35: 0.06 fac: sum of completed work is t28.31 Total factoring time = 52.0001 seconds ***factors found*** P13 = 1441605704251 P22 = 5900468172414244198531 C92 = 80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751 ans = 80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751 12/13/15 13:14:20 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.311840 using 1 random witnesses for RabinMiller 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 80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751 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 C92 rho: x^2 + 2, starting 1000 iterations on C92 rho: x^2 + 1, starting 1000 iterations on C92 nfs: couldn't find special form Segmentation fault WARNING: couldn't find factor in factor.log ^Z2: running 0 autoincreasing ecm curves... [1]+ Stopped nice n 20 ./aliqueit y 81192 d 130 c 124 b Code:
(gdb) run "factor(80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751)" Starting program: /home/bill/yafu/yafu "factor(80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751)" [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64linuxgnu/libthread_db.so.1". 12/13/15 13:19:04 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.303210 using 1 random witnesses for RabinMiller 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 80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751 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 C92 rho: x^2 + 2, starting 1000 iterations on C92 rho: x^2 + 1, starting 1000 iterations on C92 nfs: couldn't find special form Program received signal SIGSEGV, Segmentation fault. schedule_work (fwork=fwork@entry=0x7fffffffdd10, b=b@entry=0x7fffffffdca0, fobj=fobj@entry=0x72a450) at factor/factor_common.c:1665 1665 if (poly>form_type == SNFS_XYYXF) (gdb) bt #0 schedule_work (fwork=fwork@entry=0x7fffffffdd10, b=b@entry=0x7fffffffdca0, fobj=fobj@entry=0x72a450) at factor/factor_common.c:1665 #1 0x0000000000421a86 in factor (fobj=0x72a450) at factor/factor_common.c:2322 #2 0x0000000000415194 in feval (func=7, nargs=1, fobj=0x72a450) at top/calc.c:1326 #3 0x00000000004160ab in calc (in=in@entry=0x7fffffffe500, fobj=fobj@entry=0x72a450) at top/calc.c:1077 #4 0x0000000000416377 in process_expression (input_exp=input_exp@entry=0x728010 "ans", fobj=fobj@entry=0x72a450) at top/calc.c:660 #5 0x0000000000404ea5 in main (argc=<optimized out>, argv=<optimized out>) at top/driver.c:286 (gdb) p poly $1 = (snfs_t *) 0x0 Last fiddled with by Dubslow on 20151213 at 19:20 
20151213, 20:08  #5 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3·29·83 Posts 
Here's another case, though other such numbers (including larger numbers than the first case) work just fine.
Code:
12/13/15 13:55:26 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.302000 using 1 random witnesses for RabinMiller 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 155972897124165053150323876166451949244258497057014977134036720897107420510301970021028636495715314303807367883445967938284629307 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 C129 rho: x^2 + 2, starting 1000 iterations on C129 rho: x^2 + 1, starting 1000 iterations on C129 nfs: searching for brent special forms... nfs: searching for homogeneous cunningham special forms... nfs: searching for XYYXF special forms... nfs: couldn't find special form pm1: starting B1 = 150K, B2 = gmpecm default on C129 pm1: found prp11 factor = 55479801539 fac: setting target pretesting digits to 36.31 fac: 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 t36.31 ecm: 16/32 curves on C118, B1=2K, B2=gmpecm default ecm: found prp17 factor = 12873663935761753 fac: setting target pretesting digits to 31.38 fac: t15: 0.80 fac: t20: 0.03 fac: sum of completed work is t0.00 fac: work done at B1=2000: 24 curves, max work = 30 curves fac: 6 more curves at B1=2000 needed to get to t31.38 ecm: 8/8 curves on C102, B1=2K, B2=gmpecm default fac: setting target pretesting digits to 31.38 fac: t15: 1.07 fac: t20: 0.04 fac: sum of completed work is t15.19 fac: work done at B1=11000: 0 curves, max work = 74 curves fac: 74 more curves at B1=11000 needed to get to t31.38 ecm: 8/80 curves on C102, B1=11K, B2=gmpecm default ecm: found prp19 factor = 7576269951707168381 fac: setting target pretesting digits to 25.54 fac: t15: 2.40 fac: t20: 0.25 fac: t25: 0.01 fac: sum of completed work is t16.27 fac: work done at B1=11000: 16 curves, max work = 74 curves fac: 58 more curves at B1=11000 needed to get to t25.54 ecm: 8/64 curves on C83, B1=11K, B2=gmpecm default ecm: found prp16 factor = 7247469404305727 fac: setting target pretesting digits to 20.62 fac: t15: 3.73 fac: t20: 0.47 fac: t25: 0.02 fac: sum of completed work is t17.35 fac: work done at B1=11000: 32 curves, max work = 74 curves fac: 42 more curves at B1=11000 needed to get to t20.62 ecm: 48/48 curves on C67, B1=11K, B2=gmpecm default fac: setting target pretesting digits to 20.62 fac: t15: 7.73 fac: t20: 1.12 fac: t25: 0.05 fac: sum of completed work is t20.26 fac: work done at B1=50000: 0 curves, max work = 214 curves fac: 17 more curves at B1=50000 needed to get to t20.62 ecm: 24/24 curves on C67, B1=50K, B2=gmpecm default, ETA: 0 sec fac: setting target pretesting digits to 20.62 fac: t15: 11.16 fac: t20: 2.26 fac: t25: 0.16 fac: sum of completed work is t20.82 Total factoring time = 2.4501 seconds ***factors found*** P11 = 55479801539 P17 = 12873663935761753 P19 = 7576269951707168381 P16 = 7247469404305727 C67 = 3977134158716201852064410235829921436446207634591418933167156136283 ans = 3977134158716201852064410235829921436446207634591418933167156136283 Segmentation faultr (yafu)... WARNING: couldn't find factor in factor.log ^Z7: running 0 autoincreasing ecm curves... [2]+ Stopped nice n 20 ./aliqueit y 81192 d 130 c 124 b f 2002435272071628600755645846105740408965545454766597 bill@Gravemind⌚1355 ~/aliqueit ∰∂ yafu "factor(3977134158716201852064410235829921436446207634591418933167156136283)" 12/13/15 14:07:14 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.309940 using 1 random witnesses for RabinMiller 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 3977134158716201852064410235829921436446207634591418933167156136283 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 C67 rho: x^2 + 2, starting 1000 iterations on C67 rho: x^2 + 1, starting 1000 iterations on C67 nfs: couldn't find special form Segmentation fault Code:
12/13/15 14:07:33 v1.34.5 @ Gravemind, System/Build Info: Using GMPECM 7.0dev, Powered by GMP 6.0.0 detected Intel(R) Core(TM) i72600K CPU @ 3.40GHz detected L1 = 32768 bytes, L2 = 8388608 bytes, CL = 64 bytes measured cpu frequency ~= 3392.315470 using 1 random witnesses for RabinMiller 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 3977134158716201852064410235829921436446207634591418933167156136283 fac: using pretesting plan: normal fac: no tune info: using qs/gnfs crossover of 95 digits div: primes less than 10000 rho: x^2 + 3, starting 1000 iterations on C67 rho: x^2 + 2, starting 1000 iterations on C67 rho: x^2 + 1, starting 1000 iterations on C67 nfs: couldn't find special form Segmentation fault Last fiddled with by Dubslow on 20151213 at 20:09 
20151213, 22:32  #6 
"Ben"
Feb 2007
3,371 Posts 
Thanks for the test cases, I'll look into it.

20151214, 05:34  #7 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3·29·83 Posts 
And 3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317

20151215, 03:21  #8 
"Ed Hall"
Dec 2009
Adirondack Mtns
E32_{16} Posts 
In case it's of any value, here's a local run of one of the above:
Code:
(gdb) run "factor(80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751)" Starting program: /home/duser/Math/yafu/yafu "factor(80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751)" [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". fac: factoring 80354775481944023946762159827580072639125800574273593424822279914570160121893012949194928751 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 C92 rho: x^2 + 2, starting 1000 iterations on C92 rho: x^2 + 1, starting 1000 iterations on C92 nfs: couldn't find special form Program received signal SIGSEGV, Segmentation fault. schedule_work (fwork=fwork@entry=0x7fffffffd6b0, b=b@entry=0x7fffffffd640, fobj=fobj@entry=0x72f470) at factor/factor_common.c:1665 1665 if (poly>form_type == SNFS_XYYXF) (gdb) Code:
12/14/15 22:18:31 v1.34.5 @ localhost.localdomain, System/Build Info: Using GMPECM, Powered by GMP detected AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ detected L1 = 65536 bytes, L2 = 1048576 bytes, CL = 64 bytes measured cpu frequency ~= 1734.946640 using 1 random witnesses for RabinMiller 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 >> 
20151215, 06:22  #9 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1110000110101_{2} Posts 

20151215, 09:51  #10  
"Antonio Key"
Sep 2011
UK
3^{2}×59 Posts 
Quote:
Code:
12/15/15 09:42:48 v1.34.5 @ MESHGT, 12/15/15 09:42:48 v1.34.5 @ MESHGT, **************************** 12/15/15 09:42:48 v1.34.5 @ MESHGT, Starting factorization of 3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317 12/15/15 09:42:48 v1.34.5 @ MESHGT, using pretesting plan: normal 12/15/15 09:42:48 v1.34.5 @ MESHGT, using tune info for qs/gnfs crossover 12/15/15 09:42:48 v1.34.5 @ MESHGT, **************************** 12/15/15 09:42:48 v1.34.5 @ MESHGT, rho: x^2 + 3, starting 1000 iterations on C88 12/15/15 09:42:48 v1.34.5 @ MESHGT, rho: x^2 + 2, starting 1000 iterations on C88 12/15/15 09:42:48 v1.34.5 @ MESHGT, rho: x^2 + 1, starting 1000 iterations on C88 12/15/15 09:42:48 v1.34.5 @ MESHGT, pm1: starting B1 = 150K, B2 = gmpecm default on C88 12/15/15 09:42:48 v1.34.5 @ MESHGT, current ECM pretesting depth: 0.00 12/15/15 09:42:48 v1.34.5 @ MESHGT, scheduled 30 curves at B1=2000 toward target pretesting depth of 27.08 12/15/15 09:42:48 v1.34.5 @ MESHGT, Finished 30 curves using Lenstra ECM method on C88 input, B1=2K, B2=gmpecm default 12/15/15 09:42:48 v1.34.5 @ MESHGT, current ECM pretesting depth: 15.18 12/15/15 09:42:48 v1.34.5 @ MESHGT, scheduled 74 curves at B1=11000 toward target pretesting depth of 27.08 12/15/15 09:42:50 v1.34.5 @ MESHGT, Finished 74 curves using Lenstra ECM method on C88 input, B1=11K, B2=gmpecm default 12/15/15 09:42:50 v1.34.5 @ MESHGT, current ECM pretesting depth: 20.24 12/15/15 09:42:50 v1.34.5 @ MESHGT, scheduled 214 curves at B1=50000 toward target pretesting depth of 27.08 12/15/15 09:43:10 v1.34.5 @ MESHGT, Finished 214 curves using Lenstra ECM method on C88 input, B1=50K, B2=gmpecm default 12/15/15 09:43:10 v1.34.5 @ MESHGT, pm1: starting B1 = 3750K, B2 = gmpecm default on C88 12/15/15 09:43:11 v1.34.5 @ MESHGT, current ECM pretesting depth: 25.33 12/15/15 09:43:11 v1.34.5 @ MESHGT, scheduled 150 curves at B1=250000 toward target pretesting depth of 27.08 12/15/15 09:43:40 v1.34.5 @ MESHGT, Finished 152 curves using Lenstra ECM method on C88 input, B1=250K, B2=gmpecm default 12/15/15 09:43:40 v1.34.5 @ MESHGT, final ECM pretested depth: 27.10 12/15/15 09:43:40 v1.34.5 @ MESHGT, scheduler: switching to sieve method 12/15/15 09:43:40 v1.34.5 @ MESHGT, starting SIQS on c88: 3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317 12/15/15 09:43:40 v1.34.5 @ MESHGT, random seeds: 1135830540, 4215705438 12/15/15 09:43:40 v1.34.5 @ MESHGT, ==== sieve params ==== 12/15/15 09:43:40 v1.34.5 @ MESHGT, n = 88 digits, 292 bits 12/15/15 09:43:40 v1.34.5 @ MESHGT, factor base: 67200 primes (max prime = 1793699) 12/15/15 09:43:40 v1.34.5 @ MESHGT, single large prime cutoff: 197306890 (110 * pmax) 12/15/15 09:43:40 v1.34.5 @ MESHGT, double large prime range from 42 to 50 bits 12/15/15 09:43:40 v1.34.5 @ MESHGT, double large prime cutoff: 853603234607644 12/15/15 09:43:40 v1.34.5 @ MESHGT, allocating 7 large prime slices of factor base 12/15/15 09:43:40 v1.34.5 @ MESHGT, buckets hold 2048 elements 12/15/15 09:43:40 v1.34.5 @ MESHGT, using 32k sieve core 12/15/15 09:43:40 v1.34.5 @ MESHGT, sieve interval: 14 blocks of size 32768 12/15/15 09:43:40 v1.34.5 @ MESHGT, polynomial A has ~ 11 factors 12/15/15 09:43:40 v1.34.5 @ MESHGT, using multiplier of 2 12/15/15 09:43:40 v1.34.5 @ MESHGT, using SPV correction of 20 bits, starting at offset 30 12/15/15 09:43:40 v1.34.5 @ MESHGT, using SSE2 for trial division and x128 sieve scanning 12/15/15 09:43:40 v1.34.5 @ MESHGT, using SSE4.1 enabled 32k sieve core 12/15/15 09:43:40 v1.34.5 @ MESHGT, using SSE2 for resieving 1316 bit primes 12/15/15 09:43:40 v1.34.5 @ MESHGT, trial factoring cutoff at 93 bits 12/15/15 09:43:40 v1.34.5 @ MESHGT, ==== sieving started ( 4 threads) ==== 12/15/15 09:46:20 v1.34.5 @ MESHGT, trial division touched 27018867 sieve locations out of 321160347648 12/15/15 09:46:20 v1.34.5 @ MESHGT, squfof: 0 failures, 587485 attempts, 5780987 outside range, 3040733 prp, 550658 useful 12/15/15 09:46:20 v1.34.5 @ MESHGT, 68046 relations found: 19683 full + 48363 from 798480 partial, using 350037 polys (682 A polys) 12/15/15 09:46:20 v1.34.5 @ MESHGT, on average, sieving found 2.34 rels/poly and 5105.25 rels/sec 12/15/15 09:46:20 v1.34.5 @ MESHGT, trial division touched 27018867 sieve locations out of 321160347648 12/15/15 09:46:20 v1.34.5 @ MESHGT, ==== post processing stage (msieve1.38) ==== 12/15/15 09:46:21 v1.34.5 @ MESHGT, begin with 818163 relations 12/15/15 09:46:21 v1.34.5 @ MESHGT, reduce to 159262 relations in 9 passes 12/15/15 09:46:21 v1.34.5 @ MESHGT, recovered 159262 relations 12/15/15 09:46:21 v1.34.5 @ MESHGT, recovered 128167 polynomials 12/15/15 09:46:21 v1.34.5 @ MESHGT, freed 66 duplicate relations 12/15/15 09:46:21 v1.34.5 @ MESHGT, attempting to build 67980 cycles 12/15/15 09:46:21 v1.34.5 @ MESHGT, found 67980 cycles in 6 passes 12/15/15 09:46:21 v1.34.5 @ MESHGT, distribution of cycle lengths: 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 1 : 19682 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 2 : 14306 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 3 : 12262 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 4 : 8544 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 5 : 5755 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 6 : 3458 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 7 : 1960 12/15/15 09:46:21 v1.34.5 @ MESHGT, length 9+: 2013 12/15/15 09:46:21 v1.34.5 @ MESHGT, largest cycle: 19 relations 12/15/15 09:46:21 v1.34.5 @ MESHGT, matrix is 67200 x 67980 (16.7 MB) with weight 3830242 (56.34/col) 12/15/15 09:46:21 v1.34.5 @ MESHGT, sparse part has weight 3830242 (56.34/col) 12/15/15 09:46:22 v1.34.5 @ MESHGT, filtering completed in 3 passes 12/15/15 09:46:22 v1.34.5 @ MESHGT, matrix is 61270 x 61333 (15.1 MB) with weight 3465246 (56.50/col) 12/15/15 09:46:22 v1.34.5 @ MESHGT, sparse part has weight 3465246 (56.50/col) 12/15/15 09:46:22 v1.34.5 @ MESHGT, saving the first 48 matrix rows for later 12/15/15 09:46:22 v1.34.5 @ MESHGT, matrix is 61222 x 61333 (13.0 MB) with weight 3016025 (49.17/col) 12/15/15 09:46:22 v1.34.5 @ MESHGT, sparse part has weight 2783490 (45.38/col) 12/15/15 09:46:22 v1.34.5 @ MESHGT, matrix includes 64 packed rows 12/15/15 09:46:22 v1.34.5 @ MESHGT, using block size 24533 for processor cache size 6144 kB 12/15/15 09:46:22 v1.34.5 @ MESHGT, commencing Lanczos iteration 12/15/15 09:46:22 v1.34.5 @ MESHGT, memory use: 10.4 MB 12/15/15 09:46:29 v1.34.5 @ MESHGT, lanczos halted after 969 iterations (dim = 61219) 12/15/15 09:46:30 v1.34.5 @ MESHGT, recovered 15 nontrivial dependencies 12/15/15 09:46:30 v1.34.5 @ MESHGT, prp50 = 44549887547375467300285526542015138441416912928529 12/15/15 09:46:30 v1.34.5 @ MESHGT, prp38 = 70350805178075953315467064468886118373 12/15/15 09:46:30 v1.34.5 @ MESHGT, Lanczos elapsed time = 9.0170 seconds. 12/15/15 09:46:30 v1.34.5 @ MESHGT, Sqrt elapsed time = 0.0620 seconds. 12/15/15 09:46:30 v1.34.5 @ MESHGT, SIQS elapsed time = 169.3383 seconds. 12/15/15 09:46:30 v1.34.5 @ MESHGT, 12/15/15 09:46:30 v1.34.5 @ MESHGT, 12/15/15 09:46:30 v1.34.5 @ MESHGT, Total factoring time = 221.4112 seconds 

20151215, 15:07  #11 
"Ed Hall"
Dec 2009
Adirondack Mtns
2·23·79 Posts 
A couple more tests, since Antonio's worked:
with 3134...17, same machine as before (Fedora 20): Code:
(gdb) run "factor(3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317)" Starting program: /home/duser/Math/yafu/yafu "factor(3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317)" [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". fac: factoring 3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317 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 C88 rho: x^2 + 2, starting 1000 iterations on C88 rho: x^2 + 1, starting 1000 iterations on C88 nfs: couldn't find special form Program received signal SIGSEGV, Segmentation fault. schedule_work (fwork=fwork@entry=0x7fffffffd6b0, b=b@entry=0x7fffffffd640, fobj=fobj@entry=0x72f470) at factor/factor_common.c:1665 1665 if (poly>form_type == SNFS_XYYXF) (gdb) Code:
12/15/15 10:01:08 v1.34.5 @ math85, System/Build Info: Using GMPECM, Powered by GMP detected Intel(R) Core(TM) i7 CPU M 620 @ 2.67GHz detected L1 = 32768 bytes, L2 = 4194304 bytes, CL = 64 bytes measured cpu frequency ~= 2659.995130 using 1 random witnesses for RabinMiller 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 Code:
(gdb) run "factor(3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317)" Starting program: /home/math85/Math/yafu/yafu "factor(3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317)" [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64linuxgnu/libthread_db.so.1". fac: factoring 3134120459550603456922004757387837043507878909460632558456095645843878830106482782763317 fac: using pretesting plan: normal fac: no tune info: using qs/gnfs crossover of 95 digits div: primes less than 10000 rho: x^2 + 3, starting 1000 iterations on C88 rho: x^2 + 2, starting 1000 iterations on C88 rho: x^2 + 1, starting 1000 iterations on C88 nfs: couldn't find special form Program received signal SIGSEGV, Segmentation fault. schedule_work (fwork=fwork@entry=0x7fffffffd610, b=b@entry=0x7fffffffd5a0, fobj=fobj@entry=0x782450) at factor/factor_common.c:1665 1665 if (poly>form_type == SNFS_XYYXF) (gdb) 
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