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
27801143Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 988000
B2 = 52473000
LL
StatusDateUserResidueShift
Verified2005-12-12Robert MotzaA2C66660A39C42EE6069631
Verified2011-12-13NBA2C66660A39C42EE25507313
History
DateUserTypeResult
2021-11-15Architects CubedNF-PM1
B1=988000, B2=52473000
2021-10-07TheJudgerNF
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
2021-04-27Sid & AndyNF
no factor from 2^71 to 2^72
2021-03-27mikrNF
no factor from 2^70 to 2^71
2018-09-21ramgeisNF
no factor from 2^69 to 2^70
2018-04-19VictordeHollanderNF
no factor from 2^68 to 2^69
2011-12-13NBC-LL
A2C66660A39C42EE
2011-11-06Eric ChristensonNF
no factor from 2^67 to 2^68