At 06:11 PM 12/4/2001 +0000, [EMAIL PROTECTED] wrote: >Sure. Not quite the same since there appears to be no certificate of >primality, but on 30 Aug 2001 there was a message on this list to >the effect that M727 (c219) = prp98.prp128.
Does anyone know how much CPU time was spent? >So much ECM work >was done on M727 (before the NFS people started work) that it is >highly unlikely that there are any factors < 10^50, which means >that at least the 98-digit probable prime is almost certainly a >genuine prime. (Maybe that's been proved by now. ECPP on >general numbers of around 100 digits isn't very expensive.) Especially when one uses Primo, which makes numbers of even a thousand digits take perhaps an afternoon on my machine. I doubt very strongly I'm the first, but just for reference: http://www.mail-archive.com/mersenne@base.com/msg06304.html http://www.acsu.buffalo.edu/~nrussell/M727.zip Nathan _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
