This is exciting news, and smashes the old P-1 record of 42 digits by almost 8%, log-wise. I was surprised a few months ago when I did a few calculations in response to a posting of Ernst Mayer on the Forum and discovered that, even when one is looking for 40-45 digit factors with ECM, it is still a good strategy to spend, say, 10% to 15% of your overall effort doing one long P-1 run. This factor was unusual in that it did not require such a long run.
Date: Thu, 27 Feb 2003 18:02:50 -0500 From: George Woltman <[EMAIL PROTECTED]> Subject: Mersenne: New record P-1 factor Frank Hornung found the largest factor ever found using P-1. M17504141 is divisible by the 45-digit factor 426315489966437174530195419710289226952407399 _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
