Marin Mersenne 2^P-1
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MnStatusDetails
3238133Factored
FactorDigitsBitsDate
18893836166765836897432270.72021-03-23 20:31:22
ECM
DigitsB1Curves
255000028 / 280
Estimated T-Level: 20.5
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Mike WeberFC9FE78D283D7DA80
Verified (Factored)1999-06-26David FordFC9FE78D283D7DA8920751
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-03-25Taikelenn5726502E20EE13951274942253
History
DateUserTypeResult
2022-09-11JossNF-PM1
B1=1000000, B2=241175550
2022-03-12JossNF-PM1
B1=1000000, B2=134343300
2021-03-25HaiyungCERT
PRP Certification
Proof certified good
2021-03-25TaikelennC-PRP
M3238133/1889383616676583689743 : 5726502E20EE1395
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-23mnd9F-ECM
Factor: 1889383616676583689743 / (ECM curve 3, B1=50000, B2=5000000, Sigma=1226409121015958)
2021-02-02ViliamFNF
no factor from 2^68 to 2^69
2020-05-16mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-11-19TJAOINF
no factor from 2^67 to 2^68
2018-07-27JossNF-PM1
B1=400000, B2=4000000, E=6
2018-07-25JossNF-PM1
B1=400000, B2=2161483
2018-07-24JossNF-PM1
B1=400000, B2=1042383
2017-03-25Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-24ThaNF
no factor from 2^65 to 2^66
2015-02-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-15VictordeHollanderNF
no factor from 2^63 to 2^64
2011-09-30markrNF-PM1
B1=200000, B2=4500000, E=6
2011-07-25Carsten KossendeyNF
no factor from 2^61 to 2^63
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-05S485122NF
no factor from 2^60 to 2^61