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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Exponent Range:










MnStatusDetails
2563643Factored
FactorDigitsBitsDate
15150976311431340.5old
5580423116986995995932168.92018-03-18 21:22:06
ECM
DigitsB1Curves
255000066 / 280
Estimated T-Level: 21.2
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-15Oliver Kruse2F856A09E3F2747A1250129653
Verified (Factored)2017-12-01kkmrkkblmbrbk2F856A09E3F2747A1209891353
Verified2018-03-22Oliver Kruse2F856A09E3F2747A2210600453
History
DateUserTypeResult
2022-08-28USAFSSNF-PM1
B1=480000, B2=446264910
2018-03-22Oliver KruseC-PRP
M2563643/1515097631143/558042311698699599593 : 2F856A09E3F2747A
PRP: Verified
PRP without proof (not generated)
2018-03-18ATHF-ECM
Factor: 558042311698699599593 / (ECM curve 3, B1=50000, B2=5000000)
2017-12-01kkmrkkblmbrbkC-PRP
M2563643/1515097631143 : 2F856A09E3F2747A
PRP: Verified
PRP without proof (not generated)
2017-10-15Oliver KruseC-PRP
M2563643/1515097631143 : 2F856A09E3F2747A
PRP: Verified
PRP without proof (not generated)