I have decided (with prompting from someone with much more experience)
to switch one of the CPU's in my dual processor system away from LL
testing, because of the slowdown (~30%) when both are running LL.
While finding factors the "normal" way is fun, factoring difficult small
Mersenne numbers (with ECM) appeals to me even more. I have not been
able to find any info on how long it takes, though. I've searched the
last 2 1/2 years of the email list, have looked through the Primenet web
site, and have even read the Prime95 v 21 help file. I did not find a
thing on timing.
I'll be glad to RTFM if you can point me to it, and would welcome any
timing data from personal experience (with an indication on how things
scale with exponent and B1, if possible).
If I don't get any answers, I'll find out in a month when the program
gets to the ECM entry in the to-do list (currently 100 curves for M751
with B1=44,000,000), but I have no idea whether that will take hours or
months on a 1 GHz P3. Since mprime now uses intermediate files for ECM
IIRC, I don't need to worry about crashes or other system shutdowns, and
my goal is to find chunks of ECM work that take a couple weeks to a
month.
GIMPS is good!
Thank you all,
Gerry
--
mailto:[EMAIL PROTECTED]
my work: helping generate data for: http://galileo.jpl.nasa.gov/
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