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
27487991Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 270
P-1
B1 = 310000
B2 = 4107500
LL
StatusDateUserResidueShift
Verified2006-11-28Eastern Kentucky UniversityC22246D1E6D3C4F327366367
Verified2007-12-18James MakiC22246D1E6D3C4F321238158
History
DateUserTypeResult
2021-09-12TheJudgerNF
no factor from 2^73 to 2^74
2021-08-25TheJudgerNF
no factor from 2^72 to 2^73
2021-08-22TheJudgerNF
no factor from 2^71 to 2^72
2021-03-13mikrNF
no factor from 2^70 to 2^71
2018-09-24ramgeisNF
no factor from 2^69 to 2^70
2018-04-19VictordeHollanderNF
no factor from 2^68 to 2^69
2015-08-28NesowaNF
no factor from 2^67 to 2^68