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

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Exponent Range:










MnStatusDetails
4780337Factored
FactorDigitsBitsDate
979472711170735692303425794269208702412940132.82021-08-31 00:33:56
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-06-28Joshua Zucker28BD8EC235DDDC420
Verified (Factored)2000-01-12The Prime Hunters28BD8EC235DDDC422644276
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-31LaurVB4D9AC5C8D627AB31381690553
P-1 factors
DateFactorB1B2
2021-08-3197947271117073569230342579426920870241298919937444974253
History
DateUserTypeResult
2021-09-01SRBaseNF
no factor from 2^70 to 2^71
2021-09-01garoCERT
PRP Certification
Proof certified good
2021-08-31LaurVC-PRP
M4780337/9794727111707356923034257942692087024129 : B4D9AC5C8D627AB3
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-31LaurVF-PM1
Factor: 9794727111707356923034257942692087024129 / (P-1, B1=8919937, B2=444974253)
2021-08-18SRBaseNF
no factor from 2^69 to 2^70
2021-03-29TJAOINF
no factor from 2^68 to 2^69
2018-09-22YxinityNF
no factor from 2^67 to 2^68
2017-11-22YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-16snme2pm1NF
no factor from 2^65 to 2^66
2015-01-11VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-11VictordeHollanderNF
no factor from 2^63 to 2^64
2013-10-13Squeeky_SquirrelNF-PM1
B1=165000, B2=4166250, E=6
2011-10-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-27markrNF
no factor from 2^61 to 2^62
2009-08-28Carsten KossendeyNF-PM1
B1=30000, B2=412500