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
2541811Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 270
TF target 263
TF below 2^80 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 315155180340
ECM
DigitsB1Curves
2550000280 / 280
3025000066 / 640
Estimated T-Level: 25.5 ⓘ
LL
StatusDateUserResidueShift
VerifiedThomas HonoldE29C4B472CCF53260
Verified1999-08-16TwinkeloogjeE29C4B472CCF5326175226
Verified2018-06-10kkmrkkblmbrbkE29C4B472CCF53261691189
History
DateUserTypeResult
2024-04-05TJAOINF
no factor from 2^69 to 2^70
2023-11-14Stef42NF-PM1
B1=10000000, B2=315155180340
2023-01-30Architects CubedNF-PM1
B1=5000000, B2=8646469650
2021-06-21TJAOINF
no factor from 2^68 to 2^69
2019-04-15TJAOINF
no factor from 2^67 to 2^68
2018-09-08mikrNF-PM1
B1=3000000, B2=135000000, E=12
2018-08-11JossNF-PM1
B1=600000, B2=6000000, E=6
2018-06-10kkmrkkblmbrbkC-LL
E29C4B472CCF5326
2017-08-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-15Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-02-27James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-07JossNF-PM1
B1=50000
2011-01-02JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-01-27Sturle SundeNF
no factor from 2^60 to 2^61