Mikus Grinbergs writes: >As long as processing one exponent took less than 60 days, I was >willing to chance it that my exponent would not be reassigned >before that machine finished it. But now processing of larger >exponents takes more than 60 days. I am __NOT__ willing to >double my effort (i.e., make contact when half through) just to >"keep" my exponent from being reassigned. My solution - stop >participating with that machine. Since this is a non-x86 machine you're talking about, you'd be using manual test mode. If you'd looked at the GIMPS manual test checkout form lately, you'd have seen that Scott has increased the maximum time for an assignment to 120 days, precisely because first-time LL tests are now taking so long. I've run several exponents in the 7-8M range on my trusty old 200MHz Alpha 21064, but now have it doing double-checking since it gets better relative performance at those smaller FFT lengths. (But I'm working on Mlucas 3.0, which will hopefully provide a nice boost, thus breathing new life into some of these older CPUs). An exponent in the 4.2M range takes just two weeks, which is perhaps not fast enough to satisfy the thrills-a-minute crowd, but fast enough for me to be satisfied that even this oldest of my machines is contributing. -Ernst ftp://209.133.33.182/pub/mayer/README.html _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
