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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
28295789Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 1157000
B2 = 2009034300
LL
StatusDateUserResidueShift
Verified2006-07-10Dexter Senft7CE439E8BD0C012423803960
Verified2011-10-25tsc7CE439E8BD0C012415164813
History
DateUserTypeResult
2025-07-26Jason LynchNF-PM1
B1=1157000, B2=2009034300
2021-10-06TheJudgerNF
no factor from 2^74 to 2^75
2021-09-10TheJudgerNF
no factor from 2^73 to 2^74
2021-08-24TheJudgerNF
no factor from 2^72 to 2^73
2021-08-22TheJudgerNF
no factor from 2^71 to 2^72
2021-01-03mikrNF
no factor from 2^70 to 2^71
2017-04-21ramgeisNF
no factor from 2^69 to 2^70
2015-08-02NesowaNF
no factor from 2^68 to 2^69
2011-10-25tscC-LL
7CE439E8BD0C0124