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
78981137Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 275
P-1
B1 = 612000
B2 = 252802410
LL
StatusDateUserResidueShift
Verified2017-02-17Lucas Ayers19ADB89972BC9D9B71531232
Verified2025-09-15Torchwood Institute19ADB89972BC9D9B57063161
History
DateUserTypeResult
2025-09-15Torchwood InstituteC-LL
19ADB89972BC9D9B
2025-08-21LookASNF-PM1
B1=612000, B2=252802410
2017-02-17Lucas AyersC-LL
19ADB89972BC9D9B
2016-01-27NesowaNF-PM1
B1=685000, B2=13357500, E=6
2016-01-19ChuckNF
no factor from 2^74 to 2^75
2016-01-19ChuckNF
no factor from 2^73 to 2^74
2016-01-19ChuckNF
no factor from 2^72 to 2^73
2016-01-19ChuckNF
no factor from 2^71 to 2^72
2013-04-06Clown_RoyalNF
no factor from 2^70 to 2^71
2010-12-17izemizeriaqqNF
no factor from 2^69 to 2^70
2010-11-30OtmarStueppNF
no factor from 2^68 to 2^69
2010-11-24oilwarzonedotcomNF
no factor from 2^67 to 2^68
2010-11-23Fred CireraNF
no factor from 2^66 to 2^67
2010-11-19Per JessenNF
no factor from 2^65 to 2^66
2010-11-15Per JessenNF
no factor from 2^64 to 2^65
2008-07-07-Anonymous-NF
no factor to 2^64