Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
11611871Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 268
P-1
B1 = 13980694
B2 = 124183569510
ECM
DigitsB1Curves
255000032 / 280
Estimated T-Level: 20.6 ⓘ
LL
StatusDateUserResidueShift
Verified2001-01-08Sascha A. StoeterE2499C1F3A8F8C238697897
Verified2004-03-26Marc Getty / Phil FizurE2499C1F3A8F8C23660981
History
DateUserTypeResult
2025-01-20yuriy_5-1NF
no factor from 2^74 to 2^75
2024-09-02yuriy_5-1NF
no factor from 2^73 to 2^74
2024-08-06yuriy_5-1NF
no factor from 2^72 to 2^73
2024-07-01yuriy_5-1NF-PM1
B1=13980694, B2=124183569510
2021-08-22LaurVNF-PM1
B1=6189107, B2=185673210
2018-02-05Oliver KruseNF
no factor from 2^67 to 2^72
2018-01-21ramgeisNF
no factor from 2^68 to 2^69
2018-01-21ramgeisNF
no factor from 2^67 to 2^68
2016-01-15VictordeHollanderNF
no factor from 2^66 to 2^67
2014-08-27NRNF
no factor from 2^65 to 2^66
2013-02-11Richard B. WoodsNF
no factor from 2^64 to 2^65
2011-04-11Carsten KossendeyNF-PM1
B1=715000, B2=24667500, E=12