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
78906797Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 276
TF target 275
P-1
B1 = 1500000
B2 = 675197670
LL
StatusDateUserResidueShift
Verified2017-05-10drrexEA7F6FED9708DB6C10736952
Verified2025-09-14riccardo ubertiEA7F6FED9708DB6C8438245
History
DateUserTypeResult
2025-09-14riccardo ubertiC-LL
EA7F6FED9708DB6C
2025-08-23riccardo ubertiNF-PM1
B1=1500000, B2=675197670
2025-07-02Sid & AndyNF
no factor from 2^75 to 2^76
2017-05-10drrexC-LL
EA7F6FED9708DB6C
2016-07-23XolotlNF-PM1
B1=665000, B2=13300000, E=12
2016-07-09dh1NF
no factor from 2^74 to 2^75
2016-07-08RichD0NF
no factor from 2^73 to 2^74
2016-07-02Matthias WurtingerNF
no factor from 2^72 to 2^73
2016-02-12Judge HaleNF
no factor from 2^71 to 2^72
2013-04-06Clown_RoyalNF
no factor from 2^70 to 2^71
2011-02-10-Anonymous-NF
no factor from 2^69 to 2^70
2011-01-27KaliNF
no factor from 2^68 to 2^69
2011-01-19S00030NF
no factor from 2^67 to 2^68
2011-01-18Pi_RhoNF
no factor from 2^66 to 2^67
2011-01-12GrunwalderGIMPNF
no factor from 2^65 to 2^66
2011-01-11GrunwalderGIMPNF
no factor from 2^64 to 2^65