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
27801121Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 270
P-1
B1 = 265000
B2 = 1325000
LL
StatusDateUserResidueShift
Verified2005-02-23Noah Stoffman65C18DD9841CA77823243943
Verified2011-12-25arnaud65C18DD9841CA7783439397
History
DateUserTypeResult
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
2021-05-01Sid & 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
2011-12-25arnaudC-LL
65C18DD9841CA778
2011-11-06Eric ChristensonNF
no factor from 2^67 to 2^68