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

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MnStatusDetails
429181Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3247543168170906671651404194223332104.72019-05-10 11:44:21
ECM
DigitsB1Curves
2550000280 / 280
30250000207 / 640
Estimated T-Level: 26.6 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski21FC0
Verified (Factored)Chris Hall6F7E2A5AC2DC21FC0
Verified (Factored)Eivind Triel6F7E2A5AC2DC21FC375178
Verified (Factored)2002-02-17Dennis Pope6F7E2A5AC2DC21FC122623
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-05-11artorolloD9A387EE89541FE2111024553
Verified2019-05-14marssystemsD9A387EE89541FE2135442753
History
DateUserTypeResult
2019-05-14marssystemsC-PRP
M429181/32475431681709066716514041942233 : D9A387EE89541FE2
PRP: Verified
PRP without proof (small exponent)
2019-05-11artorolloC-PRP
M429181/32475431681709066716514041942233 : D9A387EE89541FE2
PRP: Verified
PRP without proof (small exponent)
2019-05-10alexF-ECM
Factor: 32475431681709066716514041942233 / (ECM curve 12, B1=250000, B2=25000000, Sigma=7085875548242503)
2018-12-11Gordon SpenceNF
no factor from 2^65 to 2^66
2017-12-21Gordon SpenceNF
no factor from 2^64 to 2^65
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-11-16Gordon SpenceNF
no factor from 2^63 to 2^64
2015-11-16Gordon SpenceNF
no factor from 2^62 to 2^63
2013-01-08markrNF-PM1
B1=25000000, B2=1000000000, E=12
2012-12-01dbaughNF
no factor from 2^61 to 2^62
2012-11-27dbaughNF
no factor from 2^60 to 2^61
2012-05-29JossNF-PM1
B1=2984486
2010-08-08Rob_DeeNF-PM1
B1=1000000, B2=2000000, E=6
2010-08-07Rob_DeeNF-PM1
B1=500000, B2=1000000