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Old 2021-09-16, 19:27   #24
Kvasir
 
Dec 2020

508 Posts
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Quote:
Originally Posted by chris2be8 View Post
I've miserably failed to find a poly for this c113:
Code:
13388164029832178605174690994702863628597531043917231628629707028750338026569517034134903882342648685574248816951
I tried several times on two systems, one with Msieve v. 1.54 (SVN 1043) and a GTX 970 and one with Msieve v. 1.54 (SVN 1030) and a GTX 760. In every case msieve.dat.ms ended up zero bytes long (my script runs -np1 -nps as the first step, then splits msieve.dat.ms and runs -npr on several cores, if it has anything to run).

Has anyone any idea if it's something about this c113 (it's part of 45^275-1, Aurifeuillian M factor)? Or how to make poly selection work? In this size range I just want something I can throw numbers at and expect them to get factored without manual intervention.
I don't think there's anything special with it. Using yafu, I factored it as
Code:
P74 = 23253040074809224483773311933322964126803314914606413239037385569218598601
P39 = 575759728051043642495256241438391908351
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