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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Exponent Range:










MnStatusDetails
2497871Factored
FactorDigitsBitsDate
8375206620542427824092169.52020-06-24 22:39:05
ECM
DigitsB1Curves
255000043 / 280
Estimated T-Level: 20.8
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joseph Charrier130B27DF03D4744E0
Verified (Factored)Klaus Kastens130B27DF03D4744E0
Verified (Factored)2015-11-14MadPoo130B27DF03D4744E2215076
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-06-25M Miller4B57A1A2FE2752F4127623353
Verified2020-06-25ATH4B57A1A2FE2752F41121691253
Verified2020-06-25atrench4B57A1A2FE2752F4191503353
History
DateUserTypeResult
2020-06-25atrenchC-PRP
M2497871/837520662054242782409 : 4B57A1A2FE2752F4
PRP: Verified
PRP without proof (not generated)
2020-06-25ATHC-PRP
M2497871/837520662054242782409 : 4B57A1A2FE2752F4
PRP: Verified
PRP without proof (not generated)
2020-06-25M MillerC-PRP
M2497871/837520662054242782409 : 4B57A1A2FE2752F4
PRP: Verified
PRP without proof (not generated)
2020-06-24Sergey NosovF-ECM
Factor: 837520662054242782409 / (ECM curve 1, B1=50000, B2=5000000)
2019-03-11TJAOINF
no factor from 2^67 to 2^68
2017-07-27Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-14MadPooC-LL
130B27DF03D4744E
2015-10-31ramgeisNF
no factor from 2^65 to 2^66
2015-03-03VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-03VictordeHollanderNF
no factor from 2^63 to 2^64
2014-12-14mikrNF-PM1
B1=2382500, B2=85770100, E=12
2014-09-10JossNF-PM1
B1=120696
2013-12-04Jerry HallettNF
no factor from 2^62 to 2^63
2012-06-11Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-25Oscar ÖstlinNF-PM1
B1=95000, B2=1971250, E=6
2010-12-22JossNF-PM1
B1=20000
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61