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

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Exponent Range:










MnStatusDetails
262147Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
2681790024711238.0old
12684201288513291650.22014-05-21 11:36:36
ECM
DigitsB1Curves
2550000280 / 280
30250000602 / 640
Estimated T-Level: 29.7
TF below 2^94 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse4842F8D65E57075E2013
Verified2017-10-12kkmrkkblmbrbk4842F8D65E57075E219497113
Verified2020-04-17Oliver Kruse5861E0DA25E1D89026728753
Verified2024-07-29kkmrkkblmbrbk5861E0DA25E1D89023935553
History
DateUserTypeResult
2024-07-29Dustin SwisherCERT
PRP Certification
Proof certified good
2024-07-29kkmrkkblmbrbkC-PRP
M262147/268179002471/1268420128851329 : 5861E0DA25E1D890
PRP proof power = 5
PRP: Verified
Proof certified good
2021-12-29LuminescenceNF-PM1
B1=300000000, B2=32473053562950
2020-04-17Oliver KruseC-PRP
M262147/268179002471/1268420128851329 : 5861E0DA25E1D890
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M262147/268179002471/1268420128851329 : 4842F8D65E57075E
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M262147/268179002471/1268420128851329 : 4842F8D65E57075E
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M262147/268179002471/1268420128851329 : 4842F8D65E57075E
PRP without proof (not generated)
2014-05-21TJAOIF
Factor: 1268420128851329