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
221152453Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
18685474978073727107112270.72020-03-14 18:20:35
History
DateUserTypeResult
2020-03-14Alexander TsupkoF
Factor: 1868547497807372710711
2018-07-18Primes.orgNF
no factor from 2^69 to 2^70
2018-02-17AlissonNF
no factor from 2^68 to 2^69
2016-09-04XZTNF
no factor from 2^67 to 2^68
2015-11-05kampfpinguin2NF
no factor from 2^66 to 2^67
2013-08-27MucolNF
no factor from 2^65 to 2^66
2011-06-06sasaki3NF
no factor from 2^64 to 2^65