Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
87901921Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
28084739933961243881397592581.22018-07-23 15:09:16
P-1 factors
DateFactorB1B2
2018-07-23280847399339612438813975971500014121250
History
DateUserTypeResult
2018-07-23Oliver KruseF-PM1
Factor: 2808473993396124388139759 / (P-1, B1=715000, B2=14121250, E=12)
2018-04-18Strolling JellyfishNF
no factor from 2^75 to 2^76
2018-04-18Strolling JellyfishNF
no factor from 2^74 to 2^75
2017-06-01-Anonymous-NF
no factor from 2^73 to 2^74
2017-05-15GregNF
no factor from 2^72 to 2^73
2015-12-20Mark RoseNF
no factor from 2^71 to 2^72
2014-01-26SWL551NF
no factor from 2^70 to 2^71
2014-01-26SWL551NF
no factor from 2^69 to 2^70
2014-01-26SWL551NF
no factor from 2^71 to 2^72
2013-09-11-Anonymous-NF
no factor from 2^68 to 2^69
2013-09-08-Anonymous-NF
no factor from 2^67 to 2^68
2013-09-04JaeckelNF
no factor from 2^66 to 2^67
2013-09-02Preben SNF
no factor from 2^65 to 2^66
2010-11-17Architects CubedNF
no factor from 2^64 to 2^65