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

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MnStatusDetails
17528867Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2293083779086144428395465112787.62022-02-26 02:53:11
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2004-05-25Dr. Raphael RichterE0E2262CF09FBADE1821412
Verified (Factored)2005-03-06Ars Technica Team Prime RibE0E2262CF09FBADE6855590
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-11-27kutens281AF71D1DAA28DC11117042453
P-1 factors
DateFactorB1B2
2022-02-262293083779086144428395465111000000121391130
History
DateUserTypeResult
2024-11-28WilliamCERT
PRP Certification
Proof certified good
2024-11-27kutensC-PRP
M17528867/229308377908614442839546511 : 281AF71D1DAA28DC
PRP proof power = 8
PRP: Verified
Proof certified good
2022-02-26masserF-PM1
Factor: 229308377908614442839546511 / (P-1, B1=1000000, B2=121391130)
2022-01-11TheJudgerNF
no factor from 2^72 to 2^73
2021-09-13-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-10SRBaseNF
no factor from 2^70 to 2^71
2020-04-13lycornNF
no factor from 2^69 to 2^70
2018-03-21ramgeisNF
no factor from 2^68 to 2^69
2018-03-21ramgeisNF
no factor from 2^67 to 2^68
2014-08-30NesowaNF
no factor from 2^66 to 2^67
2013-09-22David CampeauNF
no factor from 2^65 to 2^66