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

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MnStatusDetails
2992973Factored
FactorDigitsBitsDate
74531314437816345593032272.72021-10-31 18:29:29
ECM
DigitsB1Curves
255000093 / 280
Estimated T-Level: 21.7
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1998-06-28Harri Filen520FE4A208BB06450
Verified (Factored)1999-05-16Ulug UnligilE9D464EB67B58B0B1211212
Verified (Factored)2001-03-25David CampeauE9D464EB67B58B0B2750228
Verified (Factored)2018-10-22kkmrkkblmbrbkE9D464EB67B58B0B744027
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-11-01kutens43DA1919A8FBD7A01288788253
History
DateUserTypeResult
2021-11-01C.D.B.CERT
PRP Certification
Proof certified good
2021-11-01kutensC-PRP
M2992973/7453131443781634559303 : 43DA1919A8FBD7A0
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-31kutensF-ECM
Factor: 7453131443781634559303 / (ECM curve 5, B1=50000, B2=6700000, Sigma=4451233675175446)
2021-04-21TJAOINF
no factor from 2^68 to 2^69
2019-12-01BigBrotherNF-PM1
B1=3000000, B2=90000000, E=12
2018-12-28chuenkitNF
no factor from 2^67 to 2^68
2018-10-22kkmrkkblmbrbkC-LL
E9D464EB67B58B0B
2017-12-07Gordon SpenceNF
no factor from 2^66 to 2^67
2017-10-04JossNF-PM1
B1=588902, B2=5889020, E=6
2017-02-25JossNF-PM1
B1=294451, B2=2944510, E=6
2016-12-23JossNF-PM1
B1=204480
2016-09-22JossNF-PM1
B1=142000, B2=3221020
2016-09-21JossNF-PM1
B1=142000, B2=2928200
2016-09-14JossNF-PM1
B1=142000, B2=2662000, E=6
2016-02-24ramgeisNF
no factor from 2^65 to 2^66
2015-02-04lycornNF
no factor from 2^64 to 2^65
2015-02-04lycornNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-11-24Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-29markrNF-PM1
B1=110000, B2=2420000, E=6
2010-11-03Oscar ÖstlinNF-PM1
B1=30000, B2=427500
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61