> M(31) is also the first Mersenne prime not to be tested > as an exponent in a Mersenne prime as it is 10 digits > or over 2 billion, well beyond the current 16mil or > even 33mil exponents being tested.
Take a look at Tony Forbes page http://www.ltkz.demon.co.uk/ar2/mm61.htm MM31 has 3 known factors so there is no need to test it's primality MM61 is the first one without a known factor Sander _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
