Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
56123Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
112247616.8old
32326849824.92008-08-26 20:08:40
36476807112011341.72008-08-26 20:08:40
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000571 / 4588
Estimated T-Level: 35.6
TF below 2^113 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA0A9EC3B7504CA373013
Verified2017-10-13kkmrkkblmbrbkA0A9EC3B7504CA373785113
Verified2020-04-17Oliver KruseA96E72C2A13161963787753
Verified (Factored)2022-05-12Jorge CoveiroA96E72C2A13161961545853
Verified2024-02-03Wentao HuangA96E72C2A13161963685153
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M56123/112247/32326849/3647680711201 : A96E72C2A1316196
PRP: Verified
PRP without proof (small exponent)
2023-04-23JacobZNF-PM1
B1=620000000, B2=772483476494730
2023-04-16carlos56F-ECM
Factors: 112247,32326849 / (ECM curve 1, B1=1000000, B2=3125000000, Sigma=3080936848427733)
2022-05-12Jorge CoveiroC-PRP
M56123/112247 : A96E72C2A1316196
PRP: Verified
PRP without proof (small exponent)
2021-05-03ATHNF-PP1
Start=2/7, B1=15000000, B2=1500000000
2020-04-17Oliver KruseC-PRP
M56123/112247/32326849/3647680711201 : A96E72C2A1316196
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M56123/112247/32326849/3647680711201 : A0A9EC3B7504CA37
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M56123/112247/32326849/3647680711201 : A0A9EC3B7504CA37
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M56123/112247/32326849/3647680711201 : A0A9EC3B7504CA37
PRP without proof (not generated)
2016-10-02kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-08-26-Anonymous-F
Factor: 3647680711201
2008-08-26-Anonymous-F
Factor: 32326849