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

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MnStatusDetails
6962209Factored
FactorDigitsBitsDate
309066089015258391768472374.72021-12-06 10:54:19
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)1999-09-30Stephen HalloranA1B734C125FA625C1439074
Verified (Factored)2002-02-10Chris SnyderA1B734C125FA625C6622654
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-12-15LaurVCA07B34162EA2D5C1222970653
P-1 factors
DateFactorB1B2
2021-12-06309066089015258391768474000000456818670
History
DateUserTypeResult
2021-12-15freiburgerCERT
PRP Certification
Proof certified good
2021-12-15LaurVC-PRP
M6962209/30906608901525839176847 : CA07B34162EA2D5C
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-06Seth_TrF-PM1
Factor: 30906608901525839176847 / (P-1, B1=4000000, B2=456818670)
2021-11-17Seth_TrNF-PM1
B1=3000000, B2=75000000, E=12
2021-09-28SRBaseNF
no factor from 2^71 to 2^72
2021-09-06SRBaseNF
no factor from 2^70 to 2^71
2021-08-04takahashiNF
no factor from 2^69 to 2^70
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2018-02-26-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-24Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-26VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-15lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-09-06Carsten KossendeyNF-PM1
B1=440000, B2=13640000, E=12