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

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MnStatusDetails
4289833Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
10848795108809212215686172579.82023-07-22 08:46:30
ECM
DigitsB1Curves
255000027 / 280
Estimated T-Level: 20.5 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-04-15Ray PelzerD20D527E644CFD840
Verified (Factored)2000-04-19Brian HerrinD20D527E644CFD84181100
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-07-22Naegi MakotoDB4C198CEE012492151582053
History
DateUserTypeResult
2023-07-22slandrumCERT
PRP Certification
Proof certified good
2023-07-22Naegi MakotoC-PRP
M4289833/1084879510880921221568617 : DB4C198CEE012492
PRP proof power = 7
PRP: Verified
Proof certified good
2023-07-22Sergey NosovF-ECM
Factor: 1084879510880921221568617 / (ECM curve 15, B1=50000, B2=5000000)
2022-07-03DRobinsonPENF-PM1
B1=6200000, B2=35561477490
2021-01-24-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-23-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-23-Anonymous-NF
no factor from 2^68 to 2^69
2018-11-17chuenkitNF
no factor from 2^67 to 2^68
2018-04-26chuenkitNF
no factor from 2^66 to 2^67
2016-11-28Squeeky_SquirrelNF-PM1
B1=260000, B2=7735000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-13snme2pm1NF
no factor from 2^65 to 2^66
2014-05-26lycornNF
no factor from 2^64 to 2^65
2014-05-05JayderNF
no factor from 2^63 to 2^64
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-12-10Squeeky_SquirrelNF-PM1
B1=80000, B2=1420000, E=6
2010-12-20markrNF
no factor from 2^61 to 2^62
2009-07-28Carsten KossendeyNF-PM1
B1=25000, B2=337500