Re: The largest Mersenne number known as beeing composite!
- --- In email@example.com, "Nathan Russell"
> As someone (Brian Beesley?) once remarked, we want to be careful aboutI don't know if there is an "official" definition for Mersenne numbers...
> how we define such things. The largest Mersenne composite with prime
> exponent is an interesting record. Likewise, the largest
> double-checked LL test result (which is most likely smaller).
> However, the "largest Mersenne composite" is not. For example, since
> Graham's number is composite, 2^(Graham's number)-1 is likewise
As Paulo Ribenboim and many others, I use to call so 2^p-1 numbers
with p prime. In spite of his errors, I think that Marin Mersenne
never searched for primes amongst 2^n-1 numbers with composite exponents !