Go Back > Great Internet Mersenne Prime Search > Software

Thread Tools
Old 2006-12-30, 06:36   #1
Oct 2004

13 Posts
Default Different B1 & B2 values chosen on P-1 resume

I live in a place where there are occasional power cuts that last some 5 minutes or so. During that time, the P-1 stage 1 pauses and resumes when power is available.

On the particular exponent I am testing now, on resuming the P-1 stage 1, different B-1 & B-2 values are chosen.

Prime95 24.14 on a Pentium-M 1.4GHz 1MB L2 cache
Init B1=425000, B2 (can't remember) 5.95%
After Restarting computer B1=435000 B2=8700000 6.05% (only difference was a Server Error 2250 occurred as Internet dialup was not connected before resumption began)
After 1st Power cut B1=425000, B2=8075000 5.95%
After 2nd Power cut B1=425000, B2=8075000 5.95%

There was no change in the memory allocation and I have both day and night values set the same.

I heard that if the values are changed frequently the results of the P-1 factoring maybe inaccurate. Q1: Is this true?

Q2: Why does Prime95 fail to choose the one with a higher chance of finding a factor?

This is the 4th exponent I am testing now. The computer does not have any memory errors or stability issues as of current state.
azhad is offline   Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Question about save & resume frmky GMP-ECM 7 2012-08-02 08:22
Ill-chosen password restrictions James Heinrich Puzzles 42 2011-11-24 16:03
Question about resume Phinne Operation Billion Digits 2 2009-04-25 10:00
Resume sieving in GGNFS nuggetprime Factoring 5 2007-06-04 14:42
I've chosen primality test task, but info shows P-1 factoring! Why ? Unregistered Software 3 2004-02-23 16:45

All times are UTC. The time now is 04:32.

Sat Oct 31 04:32:04 UTC 2020 up 51 days, 1:43, 2 users, load averages: 2.21, 2.16, 2.38

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.