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
25537Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3749525695671238.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001827 / 9201
Estimated T-Level: 41.0
TF below 2^131 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseBB083BDB30A1C8241013
Verified2017-10-12kkmrkkblmbrbkBB083BDB30A1C8241219413
Verified2020-04-17Oliver Kruse04816AF7B9A464931564953
Verified2024-07-01kkmrkkblmbrbk04816AF7B9A464931987153
History
DateUserTypeResult
2024-11-20masserNF-PP1
Start=158/53, B1=100000000, B2=99900000000
2024-11-19masserNF-PP1
Start=2/7, B1=100000000, B2=99900000000
2024-11-18masserNF-PP1
Start=6/5, B1=100000000, B2=99900000000
2024-07-01kkmrkkblmbrbkC-PRP
M25537/374952569567 : 04816AF7B9A46493
PRP: Verified
PRP without proof (small exponent)
2024-03-01nordiNF-PM1
B1=8000000000, B2=2402750297697750
2023-04-05nordiNF-PM1
B1=8000000000
2020-04-17Oliver KruseC-PRP
M25537/374952569567 : 04816AF7B9A46493
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M25537/374952569567 : BB083BDB30A1C824
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M25537/374952569567 : BB083BDB30A1C824
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M25537/374952569567 : BB083BDB30A1C824
PRP without proof (not generated)
2016-12-09kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12