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

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MnStatusDetails
168143Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
568995913929.1old
16986051348791340.62008-07-27 10:49:25
1857166120936556201287212477.32016-05-27 09:47:05
ECM
DigitsB1Curves
2550000280 / 280
30250000634 / 640
Estimated T-Level: 30.0
TF below 2^95 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk01E26152C56D46633013
Verified2017-10-31ATH01E26152C56D4663312546313
Verified2020-04-17Oliver Kruse031D2CC809AF203039013553
Verified2024-02-03Wentao Huang031D2CC809AF2030313289653
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-06-03masserfactor ECM smallC1S20.00 % 2025-09-23
2024-11-14masserfactor ECM smallC1S20.00 % 2025-09-23
History
DateUserTypeResult
2025-09-13masserNF-PM1
B1=230000000, B2=21975062799690
2024-02-03slaurCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M168143/568995913/1698605134879/185716612093655620128721 : 031D2CC809AF2030
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M168143/568995913/1698605134879/185716612093655620128721 : 031D2CC809AF2030
PRP: Verified
PRP without proof (small exponent)
2017-10-31ATHC-PRP
M168143/1698605134879/185716612093655620128721/568995913 : 01E26152C56D4663
PRP: Verified
PRP without proof (small exponent)
2017-09-27csabaC-PRP
M168143/known_factors : 01E26152C56D4663
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M168143/known_factors : 01E26152C56D4663
PRP: Verified
PRP without proof (not generated)
2017-05-23kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2016-05-27TJAOIF-ECM
Factor: 185716612093655620128721
2008-07-27J FeitsmaF
Factor: 1698605134879