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

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Exponent Range:










MnStatusDetails
5661911Factored
FactorDigitsBitsDate
1487923692262359184972167.02015-09-18 20:55:32
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)2000-05-10Gordon Cross02B383ED27A94CBF434331
Verified (Factored)2001-07-17Manus Hand02B383ED27A94CBF121713
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk5EE046924A4EE5871013
Verified2018-08-15ATH5EE046924A4EE5871343878713
History
DateUserTypeResult
2018-08-15ATHC-PRP
M5661911/148792369226235918497 : 5EE046924A4EE587
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M5661911/148792369226235918497 : 5EE046924A4EE587
PRP: Verified
PRP without proof (not generated)
2015-09-18lopperF-ECM
Factor: 148792369226235918497 / (ECM curve 3, B1=50000, B2=5000000)
2015-08-27snme2pm1NF
no factor from 2^65 to 2^66
2014-11-23monstNF
no factor from 2^64 to 2^65
2014-11-22NesowaNF
no factor from 2^63 to 2^64
2011-05-22USAFSSNF-PM1
B1=65000, B2=1040000, E=6
2009-04-10GrunwalderGIMPNF
no factor from 2^62 to 2^63