Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
421052183Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
28056618108474953507212271.22019-11-07 03:20:56
History
DateUserTypeResult
2019-11-07Smok_bmv F
Factor: 2805661810847495350721 / TF: 71-72
2019-11-07Smok_bmv NF
no factor from 2^70 to 2^71
2018-11-25sasakiNF
no factor from 2^69 to 2^70
2017-11-08sasakiNF
no factor from 2^68 to 2^69
2014-08-08sasakiNF
no factor from 2^66 to 2^68
2014-07-05ANONYMOUSNF
no factor from 2^65 to 2^66
2010-10-23Architects CubedNF
no factor from 2^64 to 2^65
2010-03-19Architects CubedNF
no factor from 2^63 to 2^64