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

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Exponent Range:










MnStatusDetails
1943857Factored
FactorDigitsBitsDate
2980353455303068359133511592787.92021-04-20 11:44:39
ECM
DigitsB1Curves
2550000257 / 280
Estimated T-Level: 24.6 ⓘ
TF below 2^77 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Mischa Kenn69DAF665EE6E14B90
Verified (Factored)1998-12-27Michael Croon69DAF665EE6E14B9271037
Verified (Factored)2015-07-12MadPoo69DAF665EE6E14B91421182
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-04-21LaurVDB3678B0EC16D0D71128552653
History
DateUserTypeResult
2021-04-21citizenscience.ruCERT
PRP Certification
Proof certified good
2021-04-21LaurVC-PRP
M1943857/298035345530306835913351159 : DB3678B0EC16D0D7
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-20Chang Chia-TcheF-ECM
Factor: 298035345530306835913351159 / (ECM curve 6, B1=50000, B2=5000000, Sigma=6800719867221291)
2019-05-11chuenkitNF
no factor from 2^67 to 2^68
2018-05-03JossNF-PM1
B1=1943857, B2=194385700, E=12
2018-03-02JossNF-PM1
B1=1943857, B2=120000000, E=12
2018-02-11JossNF-PM1
B1=1943857, B2=60000000, E=12
2018-01-28JossNF-PM1
B1=1943857, B2=30000000, E=12
2017-10-27TJAOINF
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 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-06ramgeisNF
no factor from 2^65 to 2^66
2015-07-12MadPooC-LL
69DAF665EE6E14B9
2015-05-05lycornNF
no factor from 2^64 to 2^65
2015-05-05lycornNF
no factor from 2^63 to 2^64
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-06-02kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2010-01-25S485122NF
no factor from 2^60 to 2^61