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

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Exponent Range:










MnStatusDetails
1708453Factored
FactorDigitsBitsDate
1311225892081779757812492476.82019-03-16 08:10:26
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ars Technica Team Prime Rib50C35A68ECA407B50
Verified (Factored)1998-11-28Bruce Mitchell50C35A68ECA407B524605
Verified (Factored)2015-07-10MadPoo50C35A68ECA407B5610000
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-03-16trebor3BC8814C316572A51800053
Verified2019-03-17kkmrkkblmbrbk3BC8814C316572A5151177653
History
DateUserTypeResult
2019-03-17kkmrkkblmbrbkC-PRP
M1708453/131122589208177975781249 : 3BC8814C316572A5
PRP: Verified
PRP without proof (not generated)
2019-03-16treborC-PRP
M1708453/131122589208177975781249 : 3BC8814C316572A5
PRP: Verified
PRP without proof (not generated)
2019-03-16nordiF-ECM
Factor: 131122589208177975781249 / (ECM curve 18, B1=50000, B2=5000000)
2018-10-16JossNF-PM1
B1=1708453, B2=187929830, E=12
2018-06-18JossNF-PM1
B1=1708453, B2=170845300, E=12
2018-06-11TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-07-26mikrNF-PM1
B1=3642200, B2=123456789, E=12
2015-07-21JossNF-PM1
B1=1564273
2015-07-13JossNF-PM1
B1=1422067
2015-07-10MadPooC-LL
50C35A68ECA407B5
2015-07-07JossNF-PM1
B1=1292789
2015-06-25JossNF-PM1
B1=1175263
2015-06-08JossNF-PM1
B1=1068421
2015-05-26JossNF-PM1
B1=971292
2015-05-22JossNF-PM1
B1=882993
2015-05-07JossNF-PM1
B1=802721
2015-05-01JossNF-PM1
B1=729747
2015-04-28snme2pm1NF
no factor from 2^64 to 2^65
2015-04-28snme2pm1NF
no factor from 2^63 to 2^64
2015-04-08JossNF-PM1
B1=603098
2015-03-14JossNF-PM1
B1=498429
2015-03-05JossNF-PM1
B1=453118
2015-02-23JossNF-PM1
B1=411926
2015-02-13JossNF-PM1
B1=374479
2015-01-07JossNF-PM1
B1=281353
2014-10-05JossNF-PM1
B1=187569
2014-04-29JossNF-PM1
B1=150000
2014-03-31JossNF-PM1
B1=100000
2011-02-10Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2011-01-29JossNF-PM1
B1=50000
2010-10-16GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-23Architects CubedNF
no factor from 2^60 to 2^61