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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Exponent Range:










MnStatusDetails
37227451Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 271
P-1
B1 = 400000
B2 = 12000000
LL
StatusDateUserResidueShift
Verified2007-02-20Robert Barbrow8162500789AB9AD66599078
Verified2016-06-01Brian Chan8162500789AB9AD63003136
History
DateUserTypeResult
2022-07-23Sid & AndyNF
no factor from 2^72 to 2^73
2022-05-26RichD0NF
no factor from 2^71 to 2^72
2016-06-01Brian ChanC-LL
8162500789AB9AD6
2016-01-24HBendtzNF-PM1
B1=400000, B2=12000000, E=12
2014-03-02Jerry HallettNF
no factor from 2^70 to 2^71
2013-05-24garoNF
no factor from 2^69 to 2^70
2013-05-24garoNF
no factor from 2^68 to 2^69
2012-04-11Serge BatalovNF
no factor from 2^67 to 2^68
2008-11-06Carsten KossendeyNF
no factor to 2^67