Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
8639051Factored
FactorDigitsBitsDate
47392552430662020515398729520689887746947916945148.42021-12-28 00:39:11
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-11-24Eric Bravick1A775D98BA4B74967674867
Bad2002-12-09Northwestern College40C14B6C72D06EAD8022726
Verified (Factored)2003-04-19Marc Getty / Phil Fizur1A775D98BA4B74968313420
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-01-01Oliver Kruse62898C66ADBB92681765370853
P-1 factors
DateFactorB1B2
2021-12-2847392552430662020515398729520689887746947916920000001828018500
History
DateUserTypeResult
2022-01-01LoicCERT
PRP Certification
Proof certified good
2022-01-01Oliver KruseC-PRP
M8639051/473925524306620205153987295206898877469479169 : 62898C66ADBB9268
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-28masserF-PM1
Factor: 473925524306620205153987295206898877469479169 / (P-1, B1=2000000, B2=1828018500)
2021-10-08SRBaseNF
no factor from 2^71 to 2^72
2021-09-01ChuckNF
no factor from 2^70 to 2^71
2021-08-31SRBaseNF
no factor from 2^69 to 2^70
2020-05-21chuenkitNF
no factor from 2^68 to 2^69
2018-04-22monstNF
no factor from 2^67 to 2^68
2016-02-04snme2pm1NF
no factor from 2^66 to 2^67
2015-05-25VictordeHollanderNF
no factor from 2^65 to 2^66
2012-06-06James HeinrichNF-PM1
B1=205000, B2=4356250, E=6
2012-06-03James HeinrichNF
no factor from 2^64 to 2^65