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
13381Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
493007155431135.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001381 / 9201
Estimated T-Level: 40.8
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 Kruse10BE5E1461C66A0B1013
Verified2017-10-12kkmrkkblmbrbk10BE5E1461C66A0B1302313
Verified2020-04-17Oliver KruseFD3CC866A9E9FEFE1273153
Verified2024-07-01kkmrkkblmbrbkFD3CC866A9E9FEFE1907653
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13381/49300715543 : FD3CC866A9E9FEFE
PRP: Verified
PRP without proof (small exponent)
2023-12-19-Anonymous-NF-PM1
B1=100000000000, B2=122154521813133810
2023-05-18JacobZNF-PM1
B1=8200000000, B2=35024272926292650
2020-04-17Oliver KruseC-PRP
M13381/49300715543 : FD3CC866A9E9FEFE
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13381/49300715543 : 10BE5E1461C66A0B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13381/49300715543 : 10BE5E1461C66A0B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13381/49300715543 : 10BE5E1461C66A0B
PRP without proof (not generated)