RE: estimating primes (was: Re: Mersenne: Islands of Truth)

[Aaron Blosser]

> I'd also guess that the skipped prime may have been pretty close to
> 2^5014947-1, and have a number of digits close to 1408773.
<...>
> Hmm... I just changed my worktodo.ini to Test=5014947,63 (where's the 63
> come from ?  it was used for the last number I was assigned).
>
> It's saying "Error: Work-to-do file contained composite exponent: 5014947"
>
> I suppose that means it's already been tested & found to be non-prime ?
> (composite = non-prime, right?)

That's because the exponent itself needs to be prime, and 5014947 is not.
Divides by 3 in fact.

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