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
21786461Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 269
P-1
B1 = 250000
B2 = 5437500
LL
StatusDateUserResidueShift
Verified2004-01-18Thomas L Revard8DB108A7D3EF522C10658590
Verified2009-04-01mountainview8DB108A7D3EF522C6873155
History
DateUserTypeResult
2021-10-02TheJudgerNF
no factor from 2^73 to 2^74
2021-09-06TheJudgerNF
no factor from 2^72 to 2^73
2021-09-06TheJudgerNF
no factor from 2^71 to 2^72
2021-09-06TheJudgerNF
no factor from 2^70 to 2^71
2018-04-15ramgeisNF
no factor from 2^69 to 2^70
2017-11-28VictordeHollanderNF
no factor from 2^68 to 2^69
2017-05-01ramgeisNF
no factor from 2^67 to 2^68
2009-04-01mountainviewC-LL
8DB108A7D3EF522C