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

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MnStatusDetails
2531773Factored
FactorDigitsBitsDate
11510048773388881105432270.02017-09-22 17:27:02
ECM
DigitsB1Curves
255000025 / 280
Estimated T-Level: 20.4
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ed Knapton398D947A6D4F8AB00
Verified (Factored)1999-03-26Stephen Wood398D947A6D4F8AB01805972
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver KruseE95FED665C61AA191229737753
Verified2017-10-15Yaroslav BerezhkoD376527BBC3A32691013
Verified2017-12-01kkmrkkblmbrbkE95FED665C61AA19115046553
Verified2017-12-05kkmrkkblmbrbkD376527BBC3A32691229250713
History
DateUserTypeResult
2021-09-24Dylan DelgadoNF-PM1
B1=3000000, B2=300000000
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-12-05kkmrkkblmbrbkC-PRP
M2531773/1151004877338888110543 : D376527BBC3A3269
PRP: Verified
PRP without proof (not generated)
2017-12-01kkmrkkblmbrbkC-PRP
M2531773/1151004877338888110543 : E95FED665C61AA19
PRP: Verified
PRP without proof (not generated)
2017-10-15Yaroslav BerezhkoC-PRP
M2531773/1151004877338888110543 : D376527BBC3A3269
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2531773/1151004877338888110543 : E95FED665C61AA19
PRP: Verified
PRP without proof (not generated)
2017-09-22Chang Chia-TcheF-ECM
Factor: 1151004877338888110543 / (ECM curve 1, B1=50000, B2=5000000)
2017-08-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-11-08ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-06-14Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-03-21James HeinrichNF-PM1
B1=300000, B2=8000000, E=12
2011-01-06JossNF-PM1
B1=50000
2011-01-02JossNF-PM1
B1=30000
2010-12-19JossNF-PM1
B1=20000
2009-04-01Rob_DeeNF
no factor from 2^60 to 2^61