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

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MnStatusDetails
3817783Factored
FactorDigitsBitsDate
27061820105041922214115932581.22017-08-30 16:36:20
ECM
DigitsB1Curves
255000012 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Rene H. Larsen9CF6BF73C02A49E10
Verified (Factored)1999-09-07Jim Hilt9CF6BF73C02A49E11742481
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28alpertron772AE14C4913980B1013
Verified2017-12-11kkmrkkblmbrbk772AE14C4913980B151792613
History
DateUserTypeResult
2022-05-24JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF
no factor from 2^67 to 2^68
2022-03-22JossNF-PM1
B1=100000
2022-03-05JossNF-PM1
B1=90000
2017-12-11kkmrkkblmbrbkC-PRP
M3817783/2706182010504192221411593 : 772AE14C4913980B
PRP: Verified
PRP without proof (not generated)
2017-09-28alpertronC-PRP
M3817783/2706182010504192221411593 : 772AE14C4913980B
PRP: Verified
PRP without proof (not generated)
2017-08-30bamF-ECM
Factor: 2706182010504192221411593 / (ECM curve 3, B1=50000, B2=5000000)
2016-11-17Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-26ramgeisNF
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
2016-01-31JossNF-PM1
B1=310468, B2=3104680, E=6
2016-01-31JossNF-PM1
B1=258724, B2=2587240, E=6
2015-01-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-22JossNF-PM1
B1=81812
2012-03-23GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-02Squeeky_SquirrelNF-PM1
B1=65000, B2=1121250, E=6
2011-03-14markrNF
no factor from 2^61 to 2^62
2009-07-24Carsten KossendeyNF-PM1
B1=20000, B2=270000
2009-02-26S485122NF
no factor from 2^60 to 2^61