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

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MnStatusDetails
13985017Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
29660228879060825815093160292199169839139127.82023-09-18 06:04:27
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)2001-12-22Peter Hansen8FD2909B5F580DC912355339
Verified (Factored)2005-05-12d8FD2909B5F580DC97089480
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-09-18Naegi Makoto99091E0C3C9FC45D150267553
P-1 factors
DateFactorB1B2
2023-09-1829660228879060825815093160292199169839116000001604717400
History
DateUserTypeResult
2023-09-18curtiscCERT
PRP Certification
Proof certified good
2023-09-18Naegi MakotoC-PRP
M13985017/296602288790608258150931602921991698391 : 99091E0C3C9FC45D
PRP proof power = 8
PRP: Verified
Proof certified good
2023-09-18nordiF-PM1
Factor: 296602288790608258150931602921991698391 / (P-1, B1=1600000, B2=1604717400)
2023-09-14Sid & AndyNF
no factor from 2^72 to 2^73
2023-03-16nordiNF-PM1
B1=1600000
2021-10-23-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-04SRBaseNF
no factor from 2^70 to 2^71
2021-08-08SRBaseNF
no factor from 2^69 to 2^70
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2017-12-22-Anonymous-NF
no factor from 2^67 to 2^68
2015-09-20NesowaNF
no factor from 2^66 to 2^67
2014-07-15NesowaNF
no factor from 2^65 to 2^66