Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
11954479Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 268
P-1
B1 = 6189107
B2 = 185673210
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Bad2001-03-05Gilles RigalF3CF0F0328F1CF184405668
Verified2002-04-20Maurizio Codogno3484873ADF9CDB5610917748
Verified2004-06-04Yves Bellefeuille3484873ADF9CDB5610354369
Verified2006-11-09S5296443484873ADF9CDB5610354369
History
DateUserTypeResult
2024-11-17TheJudgerNF
no factor from 2^72 to 2^73
2021-08-11LaurVNF-PM1
B1=6189107, B2=185673210
2021-07-13LaurVNF-PM1
B1=4316189, B2=127521607
2019-05-11riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-02-05Oliver KruseNF
no factor from 2^67 to 2^72
2018-01-23ramgeisNF
no factor from 2^68 to 2^69
2018-01-23ramgeisNF
no factor from 2^67 to 2^68
2016-02-25YxinityNF
no factor from 2^66 to 2^67
2013-10-20NesowaNF
no factor from 2^65 to 2^66
2013-10-06lycornNF
no factor from 2^64 to 2^65