Re: Mersenne: Re: Mersenne Digest V1 #843

[Spike Jones]

>  Hans Riesel wrote:  Hi everybody,
>
>   If 2^p-1 is known to be composite with no factor known, then so is
> 2^(2^p-1)-1.
>
> Hans Riesel

It has been a long time since I have seen a more elegant
argument ender than this.  Thanks Hans!  spike

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