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

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Exponent Range:










MnStatusDetails
619981Factored
FactorDigitsBitsDate
39623270810629028367460092581.72013-12-03 01:01:34
14688440607952090813714550472890.22023-03-07 09:05:43
ECM
DigitsB1Curves
2550000280 / 280
30250000215 / 640
Estimated T-Level: 26.7
TF below 2^84 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski289C0
Verified (Factored)Alex and Nick Myrman689C0
Verified (Factored)David LintonF600BEA7EEED689C0
Verified (Factored)John SweeneyF600BEA7EEED689C0
Verified (Factored)Peter MonksF600BEA7EEED689C0
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-27Oliver Kruse83138A875B8F21DC1013
Verified (Factored)2017-09-28Oliver Kruse83138A875B8F21DC1013
Verified (Factored)2017-11-08kkmrkkblmbrbk83138A875B8F21DC11104113
Verified (Factored)2020-04-19Oliver Kruse5231C917A027B3D9150543453
Verified2023-03-07Naegi Makoto5231C917A027B3D9241466353
History
DateUserTypeResult
2023-03-07curtiscCERT
PRP Certification
Proof certified good
2023-03-07Naegi MakotoC-PRP
M619981/3962327081062902836746009/1468844060795209081371455047 : 5231C917A027B3D9
PRP proof power = 6
PRP: Verified
Proof certified good
2023-03-07TJAOIF-ECM
Factor: 1468844060795209081371455047 / (ECM curve 6, B1=250000, B2=40000000)
2023-01-09USAFSSNF-PM1
B1=2000000, B2=6199753560
2020-04-19Oliver KruseC-PRP
M619981/3962327081062902836746009 : 5231C917A027B3D9
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-11-08kkmrkkblmbrbkC-PRP
M619981/3962327081062902836746009 : 83138A875B8F21DC
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M619981/3962327081062902836746009 : 83138A875B8F21DC
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M619981/3962327081062902836746009 : 83138A875B8F21DC
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=1000000, B2=30000000, E=12
2013-12-03bamF-ECM
Factor: 3962327081062902836746009
2013-10-20David CampeauNF-PM1
B1=1275000, B2=40800000, E=12
2012-08-01JossNF-PM1
B1=1239962
2012-06-19JossNF-PM1
B1=619987
2011-08-31JossNF-PM1
B1=617493
2011-07-10JossNF-PM1
B1=370495
2010-12-29Sid & AndyNF
no factor from 2^60 to 2^61
2008-10-14Sturle SundeNF
no factor from 2^59 to 2^60
2008-10-14Sturle SundeNF
no factor from 2^58 to 2^59