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

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MnStatusDetails
6378517Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
28978642458378656210040833550779951467339127.82023-04-24 15:37:52
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)Paul Victor Novarese3F7CEE06F79F111D0
Verified (Factored)1999-09-14C. Cooper / S. Boone3F7CEE06F79F111D6231515
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-04-24linament576A992DF05481701300544353
P-1 factors
DateFactorB1B2
2023-04-24289786424583786562100408335507799514673400000018004726740
History
DateUserTypeResult
2023-04-24Team_InspectorCERT
PRP Certification
Proof certified good
2023-04-24linamentC-PRP
M6378517/289786424583786562100408335507799514673 : 576A992DF0548170
PRP proof power = 7
PRP: Verified
Proof certified good
2023-04-24linamentF-PM1
Factor: 289786424583786562100408335507799514673 / (P-1, B1=4000000, B2=18004726740)
2023-04-19linamentNF-PM1
B1=3999900
2022-10-06takahashiNF-PM1
B1=2500000, B2=50028510
2022-07-31takahashiNF
no factor from 2^71 to 2^72
2022-01-02mikrNF
no factor from 2^70 to 2^71
2021-02-11takahashiNF
no factor from 2^69 to 2^70
2020-05-05takahashiNF
no factor from 2^68 to 2^69
2018-06-04ramgeisNF
no factor from 2^67 to 2^68
2016-04-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-21snme2pm1NF
no factor from 2^65 to 2^66
2014-10-18NesowaNF-PM1
B1=390000, B2=9750000, E=12
2014-08-20lycornNF
no factor from 2^64 to 2^65
2014-08-17NesowaNF
no factor from 2^63 to 2^64