Thread: yafu bugs
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Old 2019-01-10, 22:49   #467
VictordeHolland
 
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"Victor de Hollander"
Aug 2011
the Netherlands

23·3·72 Posts
Default yafu376+msieve1028 Polysearch deadine per coefficient too large on a C120?

Code:
01/10/19 23:28:35 v1.35-beta @ Supermicro-X9DRL-iF, System/Build Info:
Using GMP-ECM 7.0.5-dev, Powered by GMP 6.1.2
detected        Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
detected L1 = 32768 bytes, L2 = 20971520 bytes, CL = 64 bytes
measured cpu frequency ~= 1999.915240
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(227010481295437363334259960947493668895875336466084780038173258247009162675779735389791151574049166747880487470296548479)
nfs: commencing nfs on c120: 227010481295437363334259960947493668895875336466084780038173258247009162675779735389791151574049166747880487470296548479
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
nfs: commencing polynomial search over range: 8192 - 8442
nfs: commencing polynomial search over range: 8692 - 8942
nfs: commencing polynomial search over range: 8942 - 9192
nfs: commencing polynomial search over range: 9192 - 9442
nfs: commencing polynomial search over range: 9442 - 9692
nfs: commencing polynomial search over range: 10442 - 10692
nfs: commencing polynomial search over range: 10192 - 10442
nfs: commencing polynomial search over range: 11442 - 11692
nfs: commencing polynomial search over range: 11942 - 12192
nfs: commencing polynomial search over range: 11692 - 11942
nfs: commencing polynomial search over range: 11192 - 11442
nfs: commencing polynomial search over range: 9942 - 10192
nfs: commencing polynomial search over range: 12442 - 12692
nfs: commencing polynomial search over range: 12942 - 13192
nfs: commencing polynomial search over range: 13192 - 13442
nfs: commencing polynomial search over range: 13692 - 13942
nfs: commencing polynomial search over range: 13442 - 13692
nfs: commencing polynomial search over range: 9692 - 9942
nfs: commencing polynomial search over range: 12192 - 12442
nfs: commencing polynomial search over range: 12692 - 12942
nfs: commencing polynomial search over range: 10692 - 10942
nfs: commencing polynomial search over range: 14442 - 14692
nfs: commencing polynomial search over range: 8442 - 8692
nfs: commencing polynomial search over range: 10942 - 11192
nfs: commencing polynomial search over range: 14192 - 14442
nfs: commencing polynomial search over range: 13942 - 14192
nfs: commencing polynomial search over range: 14692 - 14942
nfs: commencing polynomial search over range: 14942 - 15192
nfs: commencing polynomial search over range: 15692 - 15942
nfs: commencing polynomial search over range: 15192 - 15442
nfs: commencing polynomial search over range: 15442 - 15692
nfs: commencing polynomial search over range: 15942 - 16192
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
deadline: 8640000 CPU-seconds per coefficient
coeff 12180 specialq 1 - 72504683 other 1014 - 2433
It takes very long to poly search on a c120.
With the default parameters:
nfs(a120digitnumber) only a few coeffs are done in 15mins. Somehow the deadline per coefficient seems way too high?

In the end it finds a few polys.

Code:
save 1.964811e-11 -6.9653 224848.77 2.848045e-10 rroots 5
save 1.927938e-11 -6.4808 123886.85 2.845866e-10 rroots 3
save 1.903205e-11 -6.1052 113493.47 2.830937e-10 rroots 3
save 2.143278e-11 -6.6286 119879.16 3.009189e-10 rroots 5
save 2.017982e-11 -5.5322 44129.01 2.945106e-10 rroots 5
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