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

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MnStatusDetails
1858201Factored
FactorDigitsBitsDate
377195565590490695844649432685.02017-01-22 03:22:08
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)phil kennyC44A1949A9B4C56A0
Verified (Factored)1998-12-21Gary UntermeyerC44A1949A9B4C56A1205039
Verified (Factored)2015-06-27MadPooC44A1949A9B4C56A183321
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse4194B1B0449C56D31013
Verified2017-11-07kkmrkkblmbrbk4194B1B0449C56D31174202813
History
DateUserTypeResult
2017-11-07kkmrkkblmbrbkC-PRP
M1858201/37719556559049069584464943 : 4194B1B0449C56D3
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1858201/37719556559049069584464943 : 4194B1B0449C56D3
PRP: Verified
PRP without proof (not generated)
2017-01-22bamF-ECM
Factor: 37719556559049069584464943 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-09ramgeisNF
no factor from 2^65 to 2^66
2015-07-29mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-06-27MadPooC-LL
C44A1949A9B4C56A
2015-05-06snme2pm1NF
no factor from 2^64 to 2^65
2015-05-06snme2pm1NF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=169082
2014-05-26JossNF-PM1
B1=134541
2011-02-08Carsten KossendeyNF-PM1
B1=100000, B2=1725000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-13Architects CubedNF
no factor from 2^60 to 2^61