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

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MnStatusDetails
1839361Factored
FactorDigitsBitsDate
2207817677109339686533272477.52016-11-15 19:03:53
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)Jason Heilman5416A889608B8B910
Verified (Factored)1999-02-21Kent Lee5416A889608B8B911569573
Verified (Factored)2015-07-16MadPoo5416A889608B8B911630241
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse1FADB0DBA1D1B2B31013
Verified2017-11-06Chang Chia-Tche1FADB0DBA1D1B2B31370213
History
DateUserTypeResult
2017-11-06Chang Chia-TcheC-PRP
M1839361/220781767710933968653327 : 1FADB0DBA1D1B2B3
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1839361/220781767710933968653327 : 1FADB0DBA1D1B2B3
PRP: Verified
PRP without proof (not generated)
2016-11-15bamF-ECM
Factor: 220781767710933968653327 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-05ramgeisNF
no factor from 2^65 to 2^66
2015-07-16MadPooC-LL
5416A889608B8B91
2015-07-06mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-04-27snme2pm1NF
no factor from 2^64 to 2^65
2015-04-27snme2pm1NF
no factor from 2^63 to 2^64
2014-09-23JossNF-PM1
B1=169790
2014-05-19JossNF-PM1
B1=134895
2011-02-07Carsten KossendeyNF-PM1
B1=100000, B2=1675000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-20Architects CubedNF
no factor from 2^60 to 2^61