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

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Exponent Range:










MnStatusDetails
42737Factored
FactorDigitsBitsDate
54228097514223747707100510244305941930006342138.62019-02-20 12:43:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001293 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown1F1D0
Verified (Factored)George Woltman25D8AA9A555E1F1D0
Verified (Factored)Brian J. Beesley25D8AA9A555E1F1D0
Verified (Factored)2015-04-11MadPoo25D8AA9A555E1F1D2929
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-02-20ATH14BDABD7E797B86512931253
Verified2019-02-20alex14BDABD7E797B86511724253
Verified2019-02-20kkmrkkblmbrbk14BDABD7E797B86513522953
History
DateUserTypeResult
2023-05-11JacobZNF-PM1
B1=840000000, B2=614024905343850
2019-02-20kkmrkkblmbrbkC-PRP
M42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
PRP: Verified
PRP without proof (small exponent)
2019-02-20alexC-PRP
M42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
PRP: Verified
PRP without proof (small exponent)
2019-02-20ATHC-PRP
M42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
PRP: Verified
PRP without proof (small exponent)
2019-02-20kkmrkkblmbrbkF-ECM
Factor: 542280975142237477071005102443059419300063 / (ECM curve 229, B1=3000000, B2=300000000, Sigma=4370966866741672)
2018-06-17YxinityNF
no factor from 2^63 to 2^64
2018-06-13YxinityNF
no factor from 2^63 to 2^64
2016-09-05Sid & AndyNF
no factor from 2^62 to 2^63
2016-05-16JossNF-PM1
B1=200000000, B2=3600000000, E=12
2016-02-23LaurVNF
no factor from 2^57 to 2^58
2015-04-11MadPooC-LL
25D8AA9A555E1F1D
2014-07-21Sid & AndyNF
no factor from 2^61 to 2^62
2013-11-28LaurVNF
no factor from 2^60 to 2^61
2012-06-17alpertronNF-PM1
B1=100000000, B2=2000000000, E=12
2012-05-15JossNF-PM1
B1=59408794
2012-02-17JossNF-PM1
B1=24753664
2011-07-19JossNF-PM1
B1=19802931
2009-02-07Sturle SundeNF
no factor from 2^59 to 2^60
2009-01-10Sturle SundeNF
no factor from 2^58 to 2^59