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
247147721Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1962503904281579150392167.42016-10-17 18:09:48
History
DateUserTypeResult
2016-10-17Mikhail E. GolosovF
Factor: 196250390428157915039 / TF: 67-68
2015-12-12YxinityNF
no factor from 2^66 to 2^67
2013-10-29Andrew BNF
no factor from 2^65 to 2^66
2011-07-21RichardNF
no factor from 2^64 to 2^65