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
1609457Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 268
TF target 261
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 25000000
B2 = 321034878450
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
LL
StatusDateUserResidueShift
VerifiedBrian A. DalioFC0E691419A10D310
Verified1999-01-10Kai-ming PoonFC0E691419A10D311067983
Verified2015-07-20MadPooFC0E691419A10D31132220
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02Kriesel9122AC7B3C3CFBD9013
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
9122AC7B3C3CFBD9
PRP proof power = 6
PRP: Verified
Proof certified good
2022-10-18Naegi MakotoNF-PM1
B1=25000000, B2=321034878450
2019-06-17TJAOINF
no factor from 2^67 to 2^68
2017-12-04TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-11ramgeisNF
no factor from 2^65 to 2^66
2015-07-20MadPooC-LL
FC0E691419A10D31
2015-02-15VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-01-30VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-30VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-18JossNF-PM1
B1=189879
2014-04-25-Anonymous-NF-PM1
B1=150000
2011-11-16BigBrotherNF-PM1
B1=100000, B2=2000000, E=6
2010-07-12GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-04Architects CubedNF
no factor from 2^60 to 2^61