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
7573Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
45439515.5old
663977560525211445.9old
3634848957312616180332168.3old
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 KruseB484F6C23D94FCEF3013
Verified2017-10-02kkmrkkblmbrbkB484F6C23D94FCEF3013
Verified2017-12-07ATHB484F6C23D94FCEF3655213
Verified2020-04-17Oliver Kruse68B4DA2A7154AE713241853
Verified2024-02-03Wentao Huang68B4DA2A7154AE713410953
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7573/45439/66397756052521/363484895731261618033 : 68B4DA2A7154AE71
PRP: Verified
PRP without proof (small exponent)
2021-07-07ViliamFNF-PM1
B1=1000000000, B2=201000000000
2020-04-17Oliver KruseC-PRP
M7573/45439/66397756052521/363484895731261618033 : 68B4DA2A7154AE71
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M7573/45439/66397756052521/363484895731261618033 : B484F6C23D94FCEF
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M7573/45439/66397756052521/363484895731261618033 : B484F6C23D94FCEF
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7573/known_factors : B484F6C23D94FCEF
PRP without proof (not generated)