Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
79022551Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 275
P-1
B1 = 820000
B2 = 18860000
LL
StatusDateUserResidueShift
Verified2018-01-13electron18979C7772135D2D6C3D14220036
Verified2025-08-01Günter Balbig9C7772135D2D6C3D61331978
History
DateUserTypeResult
2025-08-01Günter BalbigC-LL
9C7772135D2D6C3D
2018-01-13electron1897C-LL
9C7772135D2D6C3D
2016-04-04Mark RoseNF
no factor from 2^63 to 2^64
2016-01-31dh1NF
no factor from 2^74 to 2^75
2016-01-30ChuckNF
no factor from 2^73 to 2^74
2016-01-28BdotNF
no factor from 2^72 to 2^73
2016-01-26GregNF
no factor from 2^71 to 2^72
2015-12-08Doug RheaNF-PM1
B1=820000, B2=18860000
2013-01-21ANONYMOUSNF
no factor from 2^70 to 2^71
2011-02-07korvaNF
no factor from 2^69 to 2^70
2011-01-31MclighterNF
no factor from 2^68 to 2^69
2011-01-29Zet_korNF
no factor from 2^67 to 2^68
2011-01-28ANONYMOUSNF
no factor from 2^66 to 2^67
2011-01-23GrunwalderGIMPNF
no factor from 2^65 to 2^66
2011-01-22GrunwalderGIMPNF
no factor from 2^64 to 2^65