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Old 2020-10-16, 11:28   #3
Viliam Furik
"Viliam Furík"
Jul 2018
Martin, Slovakia

1110010002 Posts

Uhm, I'm sorry, but I think you don't understand what the thread is about. I am searching for factors of Mersenne numbers which exponent is a base-10 repunit prime.

I have found that M(REP(23)) = M11111111111111111111111 has a factor.
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