Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
13477Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3984118939623143999532168.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001334 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseCFDFE9C43EDF5E3A1013
Verified2017-10-12kkmrkkblmbrbkCFDFE9C43EDF5E3A1306613
Verified2020-04-17Oliver Kruse77568D181C9CF20711016353
Verified2024-07-01kkmrkkblmbrbk77568D181C9CF207136353
P-1 factors
DateFactorB1B2
2024-01-29398411893962314399953100000000000122154521813133808
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13477/398411893962314399953 : 77568D181C9CF207
PRP: Verified
PRP without proof (small exponent)
2024-01-29-Anonymous-F-PM1
Factor: 398411893962314399953 / (P-1, B1=100000000000, B2=122154521813133810)
2023-05-19JacobZNF-PM1
B1=8200000000, B2=35024272926292650
2022-02-05JossNF-PM1
B1=1000000, B2=2389799412000
2020-04-17Oliver KruseC-PRP
M13477/398411893962314399953 : 77568D181C9CF207
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13477/398411893962314399953 : CFDFE9C43EDF5E3A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13477/398411893962314399953 : CFDFE9C43EDF5E3A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13477/398411893962314399953 : CFDFE9C43EDF5E3A
PRP without proof (not generated)