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
208343167Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1281528598666036654792166.82015-10-10 11:12:20
History
DateUserTypeResult
2015-10-10NickF
Factor: 128152859866603665479 / TF: 66-67
2013-08-08David CampeauNF
no factor from 2^65 to 2^66
2011-05-12tscNF
no factor from 2^64 to 2^65