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

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MnStatusDetails
2676139Factored
FactorDigitsBitsDate
412368774570082148511532375.12020-08-30 01:56:23
ECM
DigitsB1Curves
255000049 / 280
Estimated T-Level: 20.9
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ken Kriesel6484608759EE563B0
Verified (Factored)2000-02-01David Campeau6484608759EE563B1277011
Verified (Factored)2018-07-25kkmrkkblmbrbk6484608759EE563B2058601
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-08-30M MillerBB1C29C24E2E505519756153
History
DateUserTypeResult
2020-08-30Ben DeloCERT
PRP Certification
Proof certified good
2020-08-30M MillerC-PRP
M2676139/41236877457008214851153 : BB1C29C24E2E5055
PRP proof power = 7
PRP: Verified
Proof certified good
2020-08-30nordiF-ECM
Factor: 41236877457008214851153 / (ECM curve 4, B1=50000, B2=5000000, Sigma=6278478908360695)
2019-11-20masserNF-PM1
B1=2000000, B2=50000000, E=12
2019-04-22TJAOINF
no factor from 2^67 to 2^68
2018-09-04JossNF-PM1
B1=629880, B2=2519520
2018-09-03JossNF-PM1
B1=629880, B2=1889640
2018-08-30JossNF-PM1
B1=629880, B2=1259760
2018-08-29JossNF-PM1
B1=629880
2018-07-25kkmrkkblmbrbkC-LL
6484608759EE563B
2017-09-10Gordon SpenceNF
no factor from 2^66 to 2^67
2017-03-04JossNF-PM1
B1=314940, B2=3149400, E=6
2016-12-29JossNF-PM1
B1=218709
2016-12-16JossNF-PM1
B1=182258
2016-06-12JossNF-PM1
B1=151882, B2=4567500, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-25ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-05-12Grant McCrackenNF
no factor from 2^61 to 2^62
2010-12-07markrNF-PM1
B1=105000, B2=2283750, E=6
2010-11-19JossNF-PM1
B1=20000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61