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

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MnStatusDetails
3845119Factored
FactorDigitsBitsDate
655369656265962644972392375.82021-10-27 12:44:46
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)phil kennyE59C751B215355530
Verified (Factored)1999-09-07Stephen WoodE59C751B215355531161608
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-11-02LaurV09B393FD03DEC307187714153
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-03JossNF-PM1
B1=90000
2021-11-02EthanDCERT
PRP Certification
Proof certified good
2021-11-02LaurVC-PRP
M3845119/65536965626596264497239 : 09B393FD03DEC307
PRP proof power = 7
PRP: Verified
Proof certified good
2021-10-27daveward2005F-ECM
Factor: 65536965626596264497239 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4505556057267057)
2021-02-08axnNF-PM1
B1=15000000, B2=750000000
2020-11-23Carlos PinhoNF-PM1
B1=173000, B2=4675000, E=6
2020-10-26TJAOINF
no factor from 2^68 to 2^69
2018-08-13TJAOINF
no factor from 2^67 to 2^68
2016-11-21Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-28ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-03JossNF-PM1
B1=239500, B2=2395000, E=6
2015-01-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-18JossNF-PM1
B1=86692
2012-02-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-25Squeeky_SquirrelNF-PM1
B1=70000, B2=1137500, E=6
2011-03-05markrNF
no factor from 2^61 to 2^62
2009-07-27Carsten KossendeyNF-PM1
B1=20000, B2=270000
2009-02-26S485122NF
no factor from 2^60 to 2^61