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

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MnStatusDetails
281797Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1690783720.7old
146340070988096907256385740572993.62024-11-08 20:34:48
709758473904330406492259296980131102.52019-01-04 14:23:44
ECM
DigitsB1Curves
2550000280 / 280
30250000500 / 640
Estimated T-Level: 28.9 ⓘ
TF below 2^91 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse5A3A3E20FD8023091013
Verified (Factored)2017-10-12Oliver Kruse5A3A3E20FD802309121986213
Verified (Factored)2017-11-06kkmrkkblmbrbk5A3A3E20FD80230913105213
Verified (Factored)2019-01-05M89093874F308085EC2C5924222092153
Verified (Factored)2019-01-06Oliver Kruse4F308085EC2C5924221162153
Verified2024-11-08yuriy5-14F308085EC2C5924317542753
P-1 factors
DateFactorB1B2
2024-11-0814634007098809690725638574057259253246348019808130
History
DateUserTypeResult
2024-11-08junkman2usaCERT
PRP Certification
Proof certified good
2024-11-08yuriy5-1C-PRP
M281797/1690783/7097584739043304064922592969801/14634007098809690725638574057 : 4F308085EC2C5924
PRP proof power = 5
PRP: Verified
Proof certified good
2024-11-08yuriy5-1F-PM1
Factor: 14634007098809690725638574057 / (P-1, B1=25925324, B2=6348019808130)
2023-12-10USAFSSNF-PM1
B1=1875000, B2=10591113390
2022-03-22ConductorF-ECM
Factor: 1690783 / (ECM curve 1, B1=250000, B2=25000000, Sigma=8186268011984985)
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2022-02-06JossNF-PM1
B1=1000000, B2=18618149550
2019-01-06Oliver KruseC-PRP
M281797/1690783/7097584739043304064922592969801 : 4F308085EC2C5924
PRP: Verified (Factored)
PRP without proof (small exponent)
2019-01-05M8909387C-PRP
M281797/1690783/7097584739043304064922592969801 : 4F308085EC2C5924
PRP: Verified (Factored)
PRP without proof (small exponent)
2019-01-04TJAOIF-ECM
Factor: 7097584739043304064922592969801 / (ECM curve 24, B1=250000, B2=25000000)
2017-11-06kkmrkkblmbrbkC-PRP
M281797/1690783 : 5A3A3E20FD802309
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M281797/1690783 : 5A3A3E20FD802309
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M281797/1690783 : 5A3A3E20FD802309
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M281797/1690783 : 5A3A3E20FD802309
PRP without proof (not generated)