I've got two questions: 1) I have a P4 1.9 GHz with PC800 ram that is testing an exponent in the 333XXXXX range, and it is getting approximately 0.180 sec/iteration when completely idle on Windows 2000. According to the benchmark on mersenne.org, it should be around 0.143. Am I losing cycles somewhere? Is it possible the mainboard (Intel 850GBC) is lying to me about the clockspeed? (btw, Intel's monitor says the CPU temperature is fine)
2) I have an old PII 300 MHz that appears to have become roasted. When I turn it on after it is off for a period of time, it stalls in the memory check (64 MB). When I reset it, it boots into Windows 2000, but it is dangerously unstable. It stalls often and pixel chunks on the screen sometimes spontaneously change. When I run prime95, it complains usually within a few minutes about SUMINP != SUMOUT or rounding errors. The strange thing is that sometimes I can run the stress tester for 7 to 8 hours at a time without problems, assuming I don't touch the machine. (Although it seems to be getting worse.. it will just freeze up by itself now). So the question...does this sound like a memory problem, a CPU problem, or a mainboard problem? How can I determine exactly? Can it be saved? BTW, the subject of this message has nothing to do with the contents. But its an interesting problem, I guess. When is a^x - a + 1 prime? (did I mention that 3^957 - 2 is prime?) Regards, PdoX ([EMAIL PROTECTED]) _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
