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

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MnStatusDetails
2172539Factored
FactorDigitsBitsDate
1416238174785055729269898072786.92020-04-21 00:58:36
ECM
DigitsB1Curves
255000072 / 280
Estimated T-Level: 21.3
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Hilko Koning1FD33D4B5691774E0
Verified (Factored)1999-04-23Alexey Guzeev1FD33D4B5691774E473558
Verified (Factored)2018-04-12kkmrkkblmbrbk1FD33D4B5691774E754121
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-04-21M MillerBE6CA6DEF28F397D1165281853
Verified2020-04-22atrenchBE6CA6DEF28F397D162309853
Verified2020-04-23arnaudBE6CA6DEF28F397D1105906653
History
DateUserTypeResult
2020-04-23arnaudC-PRP
M2172539/141623817478505572926989807 : BE6CA6DEF28F397D
PRP: Verified
PRP without proof (not generated)
2020-04-22atrenchC-PRP
M2172539/141623817478505572926989807 : BE6CA6DEF28F397D
PRP: Verified
PRP without proof (not generated)
2020-04-21M MillerC-PRP
M2172539/141623817478505572926989807 : BE6CA6DEF28F397D
PRP: Verified
PRP without proof (not generated)
2020-04-21mnd9F-ECM
Factor: 141623817478505572926989807 / (ECM curve 3, B1=50000, B2=5000000, Sigma=6487891411068433)
2019-11-07mikrNF-PM1
B1=5000000, B2=200000000, E=12
2019-04-29TJAOINF
no factor from 2^67 to 2^68
2018-04-12kkmrkkblmbrbkC-LL
1FD33D4B5691774E
2016-11-13Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-01-02ramgeisNF
no factor from 2^65 to 2^66
2015-12-19HBendtzNF-PM1
B1=700000, B2=21000000, e=12
2015-03-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-25VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-05JossNF-PM1
B1=149086
2014-06-11JossNF-PM1
B1=119543
2013-09-09ramgeisNF
no factor from 2^62 to 2^63
2011-01-15markrNF-PM1
B1=90000, B2=1620000, E=6
2011-01-15JossNF-PM1
B1=50000
2010-11-07JossNF-PM1
B1=30000
2010-11-05JossNF-PM1
B1=15000
2009-01-07Sturle SundeNF
no factor from 2^61 to 2^62
2009-01-05Sturle SundeNF
no factor from 2^60 to 2^61