Mersenne numbers P-1 factors that should have already been found but were missed:

15,593 exponents (22,642 factors) like this known

Exponent ↓ | Factor | Bits | Assignment |
---|---|---|---|

M52,799,741 | 471451500830029816913 | 68.6757 | Factor=52799741,68,69 Pminus1=1,2,52799741,-1,610000,14487500,68 |