Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
51621341Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 273
P-1
B1 = 615000
B2 = 18296250
LL
StatusDateUserResidueShift
Verified2011-01-18UCLA MathematicsBF508061CBF44DBD26477724
Verified2019-10-27Ryan PropperBF508061CBF44DBD17744194
History
DateUserTypeResult
2019-10-27Ryan PropperC-LL
BF508061CBF44DBD
2019-07-01-Anonymous-NF
no factor from 2^73 to 2^74
2016-02-23Mark RoseNF
no factor from 2^60 to 2^63
2016-01-01AirSquirrelsNF
no factor from 2^72 to 2^73
2015-12-18-Anonymous-NF
no factor from 2^71 to 2^72
2015-10-07Architects CubedNF
no factor from 2^70 to 2^71
2014-12-06NesowaNF
no factor from 2^69 to 2^70
2011-01-18UCLA MathematicsC-LL
BF508061CBF44DBD
2010-01-29Torchwood InstituteNF
no factor from 2^68 to 2^69
2010-01-23SunfishNF-PM1
B1=615000, B2=18296250, E=6
2009-05-14-Anonymous-NF
no factor from 2^67 to 2^68
2009-05-08-Anonymous-NF
no factor from 2^66 to 2^67
2009-05-04-Anonymous-NF
no factor from 2^65 to 2^66
2009-05-04-Anonymous-NF
no factor from 2^64 to 2^65
2009-04-30Angelo PapaNF
no factor from 2^63 to 2^64