Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
78988097Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 275
P-1
B1 = 4356000
B2 = 1819528620
LL
StatusDateUserResidueShift
Verified2017-12-18Parker Seeley2F1A9A1C910B618562737288
Verified2025-10-13James Heinrich2F1A9A1C910B618571727113
History
DateUserTypeResult
2025-10-13James HeinrichC-LL
2F1A9A1C910B6185
2025-10-03EnsigmaNF-PM1
B1=4356000, B2=1819528620
2017-12-18Parker SeeleyC-LL
2F1A9A1C910B6185
2016-02-08Craig MeyersNF-PM1
B1=665000, B2=13466250, E=6
2016-01-16ChuckNF
no factor from 2^74 to 2^75
2016-01-16ChuckNF
no factor from 2^73 to 2^74
2016-01-16ChuckNF
no factor from 2^72 to 2^73
2011-09-12ITSNF
no factor to 2^72
2011-01-05lindeeNF
no factor from 2^64 to 2^65
2008-07-07-Anonymous-NF
no factor to 2^64