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
281758973Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1996814221212191226972167.42016-11-13 14:49:34
History
DateUserTypeResult
2016-11-13Mikhail E. GolosovF
Factor: 199681422121219122697 / TF: 67-68
2016-01-22Andrew BNF
no factor from 2^66 to 2^67
2013-12-12MucolNF
no factor from 2^65 to 2^66
2011-09-27riccardo ubertiNF
no factor from 2^64 to 2^65
2010-04-09andr113NF
no factor from 2^63 to 2^64
2010-04-09andr113NF
no factor from 2^62 to 2^63