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
2538467Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 270
TF target 263
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10000000
B2 = 20133835260
ECM
DigitsB1Curves
2550000280 / 280
30250000109 / 640
Estimated T-Level: 25.9 ⓘ
LL
StatusDateUserResidueShift
BadMarco Voerman83FBD19FEC99DE8D0
Verified1999-04-02Jim Renney271E8A73B2D2DBC21683676
Bad1999-11-17Tomasz Jakutowicz61EE40CA7226C86A575556
Verified2000-02-01Robert Riviera271E8A73B2D2DBC22283271
Verified2018-06-09kkmrkkblmbrbk271E8A73B2D2DBC22437410
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-01-09kkmrkkblmbrbkF19D7B54248D6B7129627813
History
DateUserTypeResult
2025-05-28JossNF-PM1
B1=10000000, B2=20133835260
2025-03-29JossNF-PM1
B1=10000000, B2=10050107760
2025-01-09S147127CERT
PRP Certification
CERT proof power = 7
Proof certified good
2025-01-09kkmrkkblmbrbkC-PRP
F19D7B54248D6B71
PRP proof power = 7
PRP: Verified
Proof certified good
2024-03-08TJAOINF
no factor from 2^69 to 2^70
2023-01-30Architects CubedNF-PM1
B1=5000000, B2=8646469650
2021-05-13TJAOINF
no factor from 2^68 to 2^69
2019-05-13TJAOINF
no factor from 2^67 to 2^68
2018-08-23mikrNF-PM1
B1=3000000, B2=135000000, E=12
2018-08-11JossNF-PM1
B1=600000, B2=6000000, E=6
2018-06-09kkmrkkblmbrbkC-LL
271E8A73B2D2DBC2
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
2012-06-14Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-04-03James 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
2009-02-03Sturle SundeNF
no factor from 2^60 to 2^61