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
5647601Factored
FactorDigitsBitsDate
9432542864387847061899132479.62015-09-05 07:08:30
ECM
DigitsB1Curves
25500005 / 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)1998-12-21PaySys International13874FFB1CD84DDC0
Verified (Factored)2001-08-18Stephen Wood13874FFB1CD84DDC5333395
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-12-10Oliver KruseCB2C44A4C5E136B21115595453
Verified2018-04-10kkmrkkblmbrbkCB2C44A4C5E136B21136257953
History
DateUserTypeResult
2018-04-10kkmrkkblmbrbkC-PRP
M5647601/943254286438784706189913 : CB2C44A4C5E136B2
PRP: Verified
PRP without proof (not generated)
2017-12-10Oliver KruseC-PRP
M5647601/943254286438784706189913 : CB2C44A4C5E136B2
PRP: Verified
PRP without proof (not generated)
2015-09-05lopperF-ECM
Factor: 943254286438784706189913 / (ECM curve 2, B1=50000, B2=5000000)
2015-08-26snme2pm1NF
no factor from 2^65 to 2^66
2014-11-19monstNF
no factor from 2^64 to 2^65
2014-11-18NesowaNF
no factor from 2^63 to 2^64
2011-01-30USAFSSNF-PM1
B1=65000, B2=1040000, E=6
2009-04-13GrunwalderGIMPNF
no factor from 2^62 to 2^63