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

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MnStatusDetails
168277Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
111735929926.7old
262175567928.02008-07-27 10:49:25
60054695771032.52008-07-27 10:49:25
1381695101987511547.02008-08-26 20:12:42
1217937964810134663910262004331132103.32019-04-29 16:31:18
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000169 / 1566
Estimated T-Level: 30.5
TF below 2^96 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse7DAA91C63E36D1D94013
Verified (Factored)2017-10-12kkmrkkblmbrbk7DAA91C63E36D1D9415884913
Verified2019-04-29ATH6F1FF0C38ACAEBB257628653
Verified2019-04-30kkmrkkblmbrbk6F1FF0C38ACAEBB2515547753
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-06-02masserfactor ECM smallC1S20.00 % 2025-10-04
History
DateUserTypeResult
2025-09-15masserNF-PM1
B1=230000000, B2=21975062799690
2019-04-30kkmrkkblmbrbkC-PRP
M168277/111735929/262175567/6005469577/138169510198751/12179379648101346639102620043311 : 6F1FF0C38ACAEBB2
PRP: Verified
PRP without proof (small exponent)
2019-04-29ATHC-PRP
M168277/111735929/262175567/6005469577/138169510198751/12179379648101346639102620043311 : 6F1FF0C38ACAEBB2
PRP: Verified
PRP without proof (small exponent)
2019-04-29Niels_Mache_NextcloudF-ECM
Factor: 12179379648101346639102620043311 / (ECM curve 2, B1=250000, B2=25000000)
2017-10-12kkmrkkblmbrbkC-PRP
M168277/111735929/262175567/6005469577/138169510198751 : 7DAA91C63E36D1D9
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M168277/known_factors : 7DAA91C63E36D1D9
PRP without proof (not generated)
2017-05-23kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2008-08-26-Anonymous-F
Factor: 138169510198751
2008-07-27J FeitsmaF
Factor: 6005469577
2008-07-27J FeitsmaF
Factor: 262175567