I was bored at my lunch hour today and was wondering whether anyone had investigated the extent of Mersenne primes also being the exponents to other Mersenne primes. Sitting down and looking at it, it looks as though the 3rd Mersenne prime is M(5) which in expanded form is 31 which happens to be the 8th Mersenne prime. 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.
Just thought it was interesting that M(5) is also the exponent to M(31). Cheers, Thomas A. Mullen _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
