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

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MnStatusDetails
11437Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
309142111928.2old
1868988563271237.42008-08-26 19:58:34
1978525319061197842093266492787.42008-10-16 23:57:25
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000003715 / 9201
Estimated T-Level: 42.0
TF below 2^135 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse5143516A1F178C263013
Verified2017-10-02kkmrkkblmbrbk5143516A1F178C263013
Verified2017-12-07ATH5143516A1F178C2631037613
Verified2020-04-17Oliver Kruse738B43AA312D89C331105353
Verified2024-07-01kkmrkkblmbrbk738B43AA312D89C3360553
P-1 factors
DateFactorB1B2
2023-01-20197852531906119784209326649100000000000122192573512709696
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M11437/186898856327/197852531906119784209326649/309142111 : 738B43AA312D89C3
PRP: Verified
PRP without proof (small exponent)
2023-01-20-Anonymous-F-PM1
Factor: 197852531906119784209326649 / (P-1, B1=100000000000, B2=122192573512709700)
2020-04-17Oliver KruseC-PRP
M11437/309142111/186898856327/197852531906119784209326649 : 738B43AA312D89C3
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=100000000, B2=10000000000, E=12
2008-10-16-Anonymous-F-ECM
Factor: 197852531906119784209326649
2008-08-26-Anonymous-F
Factor: 186898856327