Re: Mersenne: Several illegal sumout
Hi, At 05:17 PM 9/1/99 +0200, Dennis Jørgensen wrote: But in the test I'm running now I've had 4 of these errors (exponent just over 8 million). This seems a bit too much to me, am I right? Your result is likely OK. Prime95 recovers well from this error and it not usually an indicator that undetected errors are corrupting the results. The readme.txt file gives some ideas as to what the causes might be. I've noticed that they happen as the computer starts. This is new. The usual cause is a device driver playing a MIDI file. Probably a driver did not save the CPU state properly while initializing. With the 2 last errors I've also noticed that the tray icon appears later when the errors happen, Not unexpected. Prime95 sleeps for 5 minutes after a SUMOUT error. Celeron-400 gets 0.314 sec/interation on the exponent I'm running now, Seems right. Compare it to the PII-400 timings on http://www.mersenne.org/status.htm Remember that the timings on that page are for version 19 which is up to 10% faster than version 18. Regards, George _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
Re: Mersenne: Several illegal sumout
At 17:17 1999-09-01 +0200, Dennis Jørgensen wrote: My problem is that in the first 2 tests I've had one illegal sumout error in each (both exponents were around 7.6-7.7 million). As the readme text said this probably didn't mean anything I didn't do anything about it. But in the test I'm running now I've had 4 of these errors (exponent just over 8 million). This seems a bit too much to me, am I right? I don't think you should worry. It often happens, that after my younger brother have played some games on my (family's) fastest machine (a PII-233) I can immediately tell he have done so, because when I connect to Internet Prime95 reports a bunch of "illegal sumout", around 20 at the extreme, though usually only one or two. I hate when it happens, but as far as I know it haven't done any harm to my results. By the way, is anyone interested in a copy of p6972593 at the 690th iteration? I wasted a whole month during the summer to check it, and yes, it turned out to be prime, regardless of all the "illegal sumout"s the occured during the process! Regards, Johan Winge _ Unsubscribe list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
