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

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MnStatusDetails
12384539Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
6631366580937805956892169.22018-12-25 20:38:42
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-06-30Marc Honey84871FD42097F3D010559343
Verified (Factored)2004-10-03Vinny Romano84871FD42097F3D010254406
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-12-27riccardo ubertiBE7E5F8F888CFAB51434691153
Verified2021-02-08JaytholomewBE7E5F8F888CFAB511204476453
P-1 factors
DateFactorB1B2
2018-12-256631366580937805956894300008500000
History
DateUserTypeResult
2022-03-06nordiNF-PM1
B1=400000, B2=266270550
2022-03-02riccardo ubertiNF-PM1
B1=1500000, B2=30000000
2022-02-18nordiNF-PM1
B1=400000
2021-02-08curtiscCERT
PRP Certification
Proof certified good
2021-02-08JaytholomewC-PRP
M12384539/663136658093780595689 : BE7E5F8F888CFAB5
PRP proof power = 8
PRP: Verified
Proof certified good
2018-12-27riccardo ubertiC-PRP
M12384539/663136658093780595689 : BE7E5F8F888CFAB5
PRP: Verified
PRP without proof (not generated)
2018-12-25riccardo ubertiF-PM1
Factor: 663136658093780595689 / (P-1, B1=430000, B2=8500000, E=12)
2017-11-13ramgeisNF
no factor from 2^68 to 2^69
2015-08-05ThaNF
no factor from 2^67 to 2^68
2015-03-14ThaNF
no factor from 2^66 to 2^67
2013-09-18NesowaNF
no factor from 2^65 to 2^66
2013-07-21lycornNF
no factor from 2^64 to 2^65