Mersenne Digest        Saturday, June 28 2003        Volume 01 : Number 1077




----------------------------------------------------------------------

Date: Sun, 22 Jun 2003 20:31:04 -0400
From: George Woltman <[EMAIL PROTECTED]>
Subject: Mersenne: M997 factored

Bruce Dodson has found an incredible 57 digit factor of M997 using
prime95's ECM.  This is two digits longer than the previous longest factor
found using the ECM method.

Here's the output from prime95:

>ECM found a factor in curve #14, stage #2
>Sigma=6329517009540700, B1=44000000, B2=4290000000.
>UID: bd1024tmp, M997 has a factor:
>167560816514084819488737767976263150405095191554732902607
>Cofactor is a probable prime!

Congratulations to Bruce on this improbable discovery!

_________________________________________________________________________
Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm
Mersenne Prime FAQ      -- http://www.tasam.com/~lrwiman/FAQ-mers

------------------------------

Date: Sat, 28 Jun 2003 13:47:33 -0500
From: [EMAIL PROTECTED] (Mikus Grinbergs)
Subject: Mersenne: Double Checking

Will the 64-bit residue be the SAME when a given exponent
was originally Lucas-Lehmer tested with a 384K FFT, but
the double-check is performed using a 448K FFT ?

mikus

_________________________________________________________________________
Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm
Mersenne Prime FAQ      -- http://www.tasam.com/~lrwiman/FAQ-mers

------------------------------

End of Mersenne Digest V1 #1077
*******************************

Reply via email to