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

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MnStatusDetails
14887Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
31600463428623757998666435169442333108.02009-02-15 05:16:33
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001281 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Unknown6B2C0
Verified (Factored)George WoltmanFAF9B82C5214EB2C0
Verified (Factored)Brian J. BeesleyFAF9B82C5214EB2C0
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse2CAD24A91160FF3C1013
Verified2017-10-12kkmrkkblmbrbk2CAD24A91160FF3C1461413
Verified2020-04-17Oliver Kruse097FDAECB28D9B7711107853
Verified2024-07-01kkmrkkblmbrbk097FDAECB28D9B77127053
P-1 factors
DateFactorB1B2
2024-03-07316004634286237579986664351694423100000000000122154521813133808
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M14887/316004634286237579986664351694423 : 097FDAECB28D9B77
PRP: Verified
PRP without proof (small exponent)
2024-03-07-Anonymous-F-PM1
Factor: 316004634286237579986664351694423 / (P-1, B1=100000000000, B2=122154521813133810)
2023-05-27JacobZNF-PM1
B1=7300000000, B2=30020805351537000
2020-04-17Oliver KruseC-PRP
M14887/316004634286237579986664351694423 : 097FDAECB28D9B77
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M14887/316004634286237579986664351694423 : 2CAD24A91160FF3C
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M14887/316004634286237579986664351694423 : 2CAD24A91160FF3C
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M14887/316004634286237579986664351694423 : 2CAD24A91160FF3C
PRP without proof (not generated)
2009-02-15Jayson KingF-ECM
Factor: 316004634286237579986664351694423