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
27238433Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 320000
B2 = 6640000
LL
StatusDateUserResidueShift
Verified2005-02-12John D HagersonA4D1B368DC6BACDA13410185
Verified2011-03-18unconnectedA4D1B368DC6BACDA438969
History
DateUserTypeResult
2021-10-11TheJudgerNF
no factor from 2^74 to 2^75
2021-09-12TheJudgerNF
no factor from 2^73 to 2^74
2021-08-23TheJudgerNF
no factor from 2^72 to 2^73
2021-08-23TheJudgerNF
no factor from 2^71 to 2^72
2021-02-24mikrNF
no factor from 2^70 to 2^71
2018-09-27ramgeisNF
no factor from 2^69 to 2^70
2018-04-09VictordeHollanderNF
no factor from 2^68 to 2^69
2016-01-25NRNF
no factor from 2^67 to 2^68
2011-03-18unconnectedC-LL
A4D1B368DC6BACDA