Brian Beesley wrote: >If you have a reasonable amount of memory on your system I'd >reccomend running P-1 on selected exponents just above 1 >million - use the pminus1 database file to direct your work. >Otherwise ECM on small exponents, or trial factoring on those >exponents which have not been done "deep enough" - there >are a considerable number of these in the 6M - 8M exponent >range.
If anybody is interested in P-1'ing exponents just above 1 Million... I am just finishing the range 1,000,193 - 1,001,089 to the limits B1=10M, B2=1B... and can provide the save files from the exponents in this range... (for deeper testing)... I will note however... that even on a decent machine... an Athlon 1.4GHz... it has taken approx. 5.4 days for each exponent to get to these limits... and will only increase as the limits do... Since... IMHO... the odds of finding a factor using P-1 on these exponents... even increasing to the limits of Prime95... (4.29B)... is low... I am going to start attempting to ECM these exponents to a depth of 30 digits... (B1=250K, B2=25M)... If unsuccessful on the ECM to 30 digits... than I will just stick to the 3 main other tasks/ranges I am already working on.... Eric Hahn _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
