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

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MnStatusDetails
2280869Factored
FactorDigitsBitsDate
1898314585433252205619212477.32020-08-31 08:32:18
ECM
DigitsB1Curves
2550000100 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Malcolm Farmer77FA07462F28B2900
Verified (Factored)1999-03-15Kevin77FA07462F28B2902213188
Verified (Factored)2018-04-27kkmrkkblmbrbk77FA07462F28B2902001397
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-09-01jvangA4E92A63D0F871F91151279153
History
DateUserTypeResult
2023-01-28USAFSSNF-PM1
B1=288000, B2=308189700
2020-09-01Ben DeloCERT
PRP Certification
Proof certified good
2020-09-01jvangC-PRP
M2280869/189831458543325220561921 : A4E92A63D0F871F9
PRP proof power = 7
PRP: Verified
Proof certified good
2020-08-31daveward2005F-ECM
Factor: 189831458543325220561921 / (ECM curve 7, B1=50000, B2=5000000)
2019-09-10YxinityNF
no factor from 2^67 to 2^68
2018-04-27kkmrkkblmbrbkC-LL
77FA07462F28B290
2017-02-13Smok_bmv NF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-23JossNF-PM1
B1=518984, B2=5189840, E=6
2015-11-01ramgeisNF
no factor from 2^65 to 2^66
2015-03-12VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-12VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-06JossNF-PM1
B1=141280
2014-06-11JossNF-PM1
B1=113140
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-09Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-15Oscar ÖstlinNF-PM1
B1=85000, B2=1742500, E=6
2010-11-24Oscar ÖstlinNF-PM1
B1=75011
2010-11-14JossNF-PM1
B1=20000
2010-11-07JossNF-PM1
B1=15000
2009-01-15Sturle SundeNF
no factor from 2^60 to 2^61