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:





MnDetails
42737
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
54228097514223747707100510244305941930006342138.62019-02-20 12:43:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001321 / 9201
Estimated T-Level: 40.7 ⓘ
TF below 2^130 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
FactoredUnknown1F1D0Unknown,(aka U)
FactoredGeorge Woltman25D8AA9A555E1F1D0Woltman,Prime95,first web release,(aka W4)
FactoredBrian J. Beesley25D8AA9A555E1F1D0Mac,John Sweeney,v1.4,(aka J3)
Factored2015-04-11MadPoo 🙂25D8AA9A555E1F1D2929Windows 64-bit,Prime95,v26,(aka We4)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2019-02-20ATH14BDABD7E797B86512931253
Verified
No proof (small exponent)
2019-02-20alex14BDABD7E797B86511724253
Verified
No proof (small exponent)
2019-02-20kkmrkkblmbrbk14BDABD7E797B86513522953
History
DateUserTypeResult
2025-08-24masserNF-PM1B1=8200000000, B2=1801222962528990
2024-12-08masserNF-PP1Start=6/5, B1=60000000, B2=59940000000
2024-12-04masserNF-PP1Start=2/7, B1=60000000, B2=59940000000
2024-11-29masserNF-PP1Start=166/61, B1=60000000, B2=59940000000
2023-05-11JacobZNF-PM1B1=840000000, B2=614024905343850
2019-02-20kkmrkkblmbrbkC-PRPM42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
2019-02-20alexC-PRPM42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
2019-02-20ATHC-PRPM42737/542280975142237477071005102443059419300063 : 14BDABD7E797B865
2019-02-20kkmrkkblmbrbkF-ECMFactor: 542280975142237477071005102443059419300063 / ECM curve 229, B1=3000000, B2=300000000, Montgomery Sigma=4370966866741672
2018-06-17YxinityNFno factor TF: 63-64
2018-06-13YxinityNFno factor TF: 63-64
2016-09-05Sid & AndyNFno factor TF: 62-63
2016-05-16JossNF-PM1B1=200000000, B2=3600000000, E=12
2016-02-23LaurVNFno factor TF: 57-58
2015-04-11MadPoo 🙂C-LL25D8AA9A555E1F1D
2014-07-21Sid & AndyNFno factor TF: 61-62
2013-11-28LaurVNFno factor TF: 60-61
2012-06-17alpertronNF-PM1B1=100000000, B2=2000000000, E=12
2012-05-15JossNF-PM1B1=59408794
2012-02-17JossNF-PM1B1=24753664
2011-07-19JossNF-PM1B1=19802931
2009-02-07Sturle SundeNFno factor TF: 59-60
2009-01-10Sturle SundeNFno factor TF: 58-59
2003-10-14-anonymous-NF-PM1B1=16777216, B2=1677721600, E=12
2003-10-08-anonymous-NF-PM1B1=8388608, B2=838860800, E=12
2003-07-21-anonymous-NF-PM1B1=4194304, B2=419430400, E=12
2003-05-26-anonymous-NF-PM1B1=2097152, B2=209715200, E=12
2003-04-27-anonymous-NF-PM1B1=1048576, B2=104857600, E=48
2003-04-03-anonymous-NF-PM1B1=524288, B2=52428800, E=48
2003-03-27-anonymous-NF-PM1B1=262144, B2=26214400, E=30
2003-02-02-anonymous-NF-PM1B1=131072, B2=13107200, E=30
2002-11-16-anonymous-NFno factor TF: 1-57
2002-07-20-anonymous-NF-PM1B1=65536, B2=6553600, E=12
2002-06-09-anonymous-NF-PM1B1=32768, B2=3276800
2002-04-28-anonymous-NF-PM1B1=16384, B2=1638400
2001-08-18Alex KruppaNF-PM1B1=1000000, B2=100000000
2001-04-29-anonymous-NF-PM1B1=100000, B2=10000000
2000-10-28-anonymous-NFno factor TF: 1-56
2000-03-22-anonymous-NFno factor TF: 1-54
1999-10-21-anonymous-NFno factor TF: 52-53