Top P-1 factors of Mersenne numbers

Top P-1 factors of all time for giheff

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#UserExponentFactorBits*Date
1giheff4708235929581509562999018409671377.9692010-07-02 15:35:00
2giheff4410397117229677022335481828319177.1892009-04-01 18:53:00
3giheff4762370372251397899653915273769.2922010-03-21 07:50:00
4giheff4492494733813805802679143012968.1962008-12-29 09:09:00