Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
3892841Factored
FactorDigitsBitsDate
12233275082689917111960.1old
30080706509916571271961.42016-04-22 11:47:05
62789645355263828009772272.42019-11-15 16:37:01
371079766942474770853992375.02021-07-20 08:07:27
ECM
DigitsB1Curves
255000023 / 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)1998-11-21Richard Landells1924FD3DA53AF098500590
Verified (Factored)1999-10-29C. Cooper / S. Boone1924FD3DA53AF0983614270
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-20kkmrkkblmbrbkB2168E3F96B709012013
Verified (Factored)2017-12-27Oliver KruseB2168E3F96B709012360025013
Verified (Factored)2019-11-15mnd98CE9169207B2A84D377486753
Verified (Factored)2019-11-18arnaud8CE9169207B2A84D3306649853
Verified2021-07-20ATH8CE9169207B2A84D4232114853
P-1 factors
DateFactorB1B2
2019-11-15627896453552638280097740000100000
History
DateUserTypeResult
2022-07-18JossNF-PM1
B1=3892841, B2=3933588750
2022-06-19LordJuliusNF
no factor from 2^66 to 2^67
2022-06-19LordJuliusNF
no factor from 2^65 to 2^66
2022-06-19LordJuliusNF
no factor from 2^64 to 2^65
2022-06-19LordJuliusNF
no factor from 2^63 to 2^64
2022-06-19LordJuliusNF
no factor from 2^62 to 2^63
2022-03-21JossNF-PM1
B1=1000000, B2=1032840900
2022-01-18JossNF
no factor from 2^67 to 2^68
2022-01-18JossNF-PM1
B1=1000000, B2=431367300
2021-07-20khyuCERT
PRP Certification
Proof certified good
2021-07-20ATHC-PRP
M3892841/1223327508268991711/3008070650991657127/6278964535526382800977/37107976694247477085399 : 8CE9169207B2A84D
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-20ATHF-PP1
Start=2/7, B1=1000000, B2=100000000, Factor: 37107976694247477085399
2019-11-18arnaudC-PRP
M3892841/1223327508268991711/3008070650991657127/6278964535526382800977 : 8CE9169207B2A84D
PRP: Verified (Factored)
PRP without proof (not generated)
2019-11-15mnd9C-PRP
M3892841/1223327508268991711/3008070650991657127/6278964535526382800977 : 8CE9169207B2A84D
PRP: Verified (Factored)
PRP without proof (not generated)
2019-11-15JossF-PM1
Factor: 6278964535526382800977 / (P-1, B1=40000, B2=100000)
2017-12-27Oliver KruseC-PRP
M3892841/1223327508268991711/3008070650991657127 : B2168E3F96B70901
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M3892841/1223327508268991711/3008070650991657127 : B2168E3F96B70901
PRP: Verified (Factored)
PRP without proof (not generated)
2016-04-22TJAOIF
Factor: 3008070650991657127 / TF: 61-62