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
208380247Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
3773555825457541364812168.42017-10-31 09:42:40
History
DateUserTypeResult
2025-03-23James HeinrichF
Factor: 377355582545754136481 / TF: 68-70
2017-10-31NickF
Factor: 377355582545754136481 / TF: 68-69
2016-09-04DerekNF
no factor from 2^67 to 2^68
2015-10-26SummyNF
no factor from 2^66 to 2^67
2013-08-06subgeniusNF
no factor from 2^65 to 2^66
2011-05-12sasaki3NF
no factor from 2^64 to 2^65