On Sun, Mar 09, 2003 at 08:18:18PM -0800, Chris Marble wrote: > Chris Marble wrote: > > > I set up a P4 with 1GB RAM to grab some DCs. All need P-1 run. I cranked up > the memory available in local.ini and it's running with E=12. The 1st exponent > completed. It finished P-1 on the second in just over 3 hours - also with E=12. > I killed the mprime, moved the exponent to the end of Worktodo.ini and started > mprime back up. I'll check back in a couple of hours and see if I should > rotate to the next exponent. Then I will have a hunk of nicely P-1 DCs I can > move off to boxes with out enough RAM for the deep searches. > Sound right?
What Anurag said. Will save yourself a lot of bother. Also *definitely* set SkipTrialFactoring=1 in local.ini. It's unlikely you'll get any DCs needing more TF, but if you do, you want to leave that to a non-P4. Just over three hours is slower than I would have expected. My humble, non-SSE2 capable 800MHz Duron has been taking about 3 3/4 hours to complete a DC P-1 with the standard client. Possible reasons are:- 1. Your FFT length is probably greater. All my recent work has been done on exponents < 9071000, but current DC assignments are ~ 9175000 2. You're using an E=12 plan, in comparison with my E=4. (I haven't been recording the timings of my modified client, which uses E=12.) Higher E is quite a bit more expensive in processing time, but should find more factors. To get an E=12 plan, your D value (which isn't recorded in results.txt) must be > 420. (My D=420) I would guess your D=630 or perhaps even 840. Higher D finds roughly the same number of factors more cheaply than lower D, but I doubt this is enough to offset the increased cost of E=12 How much memory is actually being used in stage 2? 3. Typical values of my B1 and B2 have been 50000 and 750000 respectively. Are yours higher? I would be *very* interested if you could send me any stage 2 factors you find. Just copy the two line report in results.txt, and confirm the E value (which is only recorded when a P-1 fails, but won't change unless either the memory settings or the FFT size changes.) > [EMAIL PROTECTED] - HMC UNIX Systems Manager Daran G. _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
