Mersenne: Re: Mersenne Digest V1 #694

[STL137]

<< Hi all
 Is a decimal 23-digit numbers 11111111111111111111111  prime ?  
 Could you tell me the answer with proof? >>

Giving proof of primality in a text message? Hrm. Interesting.

S. "That's not even related to Mersennes distantly... sort of" L.
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