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
13681Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1203929720.2old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001375 / 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 Kruse5CF4701E75EDFAF51013
Verified2017-10-12kkmrkkblmbrbk5CF4701E75EDFAF51585913
Verified2020-04-17Oliver Kruse8EAA220470F1E1F41231453
Verified2024-07-01kkmrkkblmbrbk8EAA220470F1E1F41297953
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M13681/1203929 : 8EAA220470F1E1F4
PRP: Verified
PRP without proof (small exponent)
2024-01-29-Anonymous-NF-PM1
B1=100000000000, B2=122154521813133810
2023-05-20JacobZNF-PM1
B1=8000000000, B2=35524619698317750
2022-03-04Ethan O'ConnorNF-PM1
B1=1000000000, B2=248016220902450
2021-12-15Lisander ViaeneNF-PM1
B1=101101101, B2=19711193892390
2020-04-17Oliver KruseC-PRP
M13681/1203929 : 8EAA220470F1E1F4
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M13681/1203929 : 5CF4701E75EDFAF5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13681/1203929 : 5CF4701E75EDFAF5
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M13681/1203929 : 5CF4701E75EDFAF5
PRP without proof (not generated)