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
7537Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
723553619.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002050 / 9201
Estimated T-Level: 41.1
TF below 2^132 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse8AE7EF6A9DCDBC311013
Verified2017-10-12kkmrkkblmbrbk8AE7EF6A9DCDBC311359913
Verified2020-04-17Oliver KruseB453EA880E769972172253
Verified2024-02-03Wentao HuangB453EA880E7699721497153
History
DateUserTypeResult
2024-11-09masserNF-PM1
B1=50000000000, B2=227960449185719250
2024-02-03Wentao HuangC-PRP
M7537/723553 : B453EA880E769972
PRP: Verified
PRP without proof (small exponent)
2021-07-06ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7537/723553 : B453EA880E769972
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7537/723553 : 8AE7EF6A9DCDBC31
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7537/723553 : 8AE7EF6A9DCDBC31
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7537/723553 : 8AE7EF6A9DCDBC31
PRP without proof (not generated)