I am running v19.2.1 on a P3/500 and can achieve 0.34 second iteration time with Prime running alone. However, because of our dodgy electricity supply out here in the country, I have to run the m/c with an APC UPS which has Powerchute 5.0.1 installed to achieve graceful shutdown if there is a protracted power failure. Even despite setting Prime95 to priority 9, a program in the UPS suite - ICONCLNT.EXE - takes 78% to Prime's 17% of the cycles according to Wintop98. Before getting in touch with the manufacturer of the UPS system, who is not going to see his program as malfunctioning, I thought I would check if anyone else in the GIMPS programme has had a similar problem and found a way round it. The only things taking any signficant resources for the vast proportion of the time are Prime 95 and the UPS to ensure the power supply integrity is guaranteed. I hope this is not a Catch 22 situation. David Hoyle [EMAIL PROTECTED] _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
