Marin Mersenne 2^P-1
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MnStatusDetails
7242887Factored
FactorDigitsBitsDate
8116822591350697617232104257187699551938125.92023-02-26 03:17:24
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-05-02Alan VidmarDBBBAFDE66F86F770
Verified (Factored)2002-04-14Ars Technica Team Prime RibDBBBAFDE66F86F773296350
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-03-03rucioD720C64E365D8F6D1661061853
P-1 factors
DateFactorB1B2
2023-02-26811682259135069761723210425718769955191600000016143964200
History
DateUserTypeResult
2023-03-03Naegi MakotoCERT
PRP Certification
Proof certified good
2023-03-03rucioC-PRP
M7242887/81168225913506976172321042571876995519 : D720C64E365D8F6D
PRP proof power = 8
PRP: Verified
Proof certified good
2023-02-26yoyorocks1F-PM1
Factor: 81168225913506976172321042571876995519 / (P-1, B1=16000000, B2=16143964200)
2021-12-26-Anonymous-NF
no factor from 2^72 to 2^73
2021-09-26SRBaseNF
no factor from 2^71 to 2^72
2021-08-24SRBaseNF
no factor from 2^70 to 2^71
2021-08-19SRBaseNF
no factor from 2^69 to 2^70
2020-03-13TJAOINF
no factor from 2^68 to 2^69
2020-02-04storm5510NF-PM1
B1=385000, B2=8470000, E=12
2018-08-01ramgeisNF
no factor from 2^67 to 2^68
2016-10-14Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-16VictordeHollanderNF
no factor from 2^65 to 2^66
2013-11-14David CampeauNF
no factor from 2^64 to 2^65
2013-11-03NesowaNF
no factor from 2^63 to 2^64
2012-07-21NesowaNF-PM1
B1=90000, B2=1620000, E=6