Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2207861Composite, with 7 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
13247167823.7old
242864711927.92008-07-14 20:21:57
794829961929.62008-07-14 20:21:57
176982137771134.02008-07-14 20:21:57
1385071713759120071856.92015-05-12 11:48:59
89111753341519692711963.02016-11-15 12:07:11
7691061442287521876572169.42022-05-18 12:20:38
ECM
DigitsB1Curves
2550000280 / 280
30250000135 / 640
Estimated T-Level: 26.1 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-10Oliver KruseFD0EF16C47EA48851013
Verified (Factored)2017-10-18Oliver KruseA2E9D8DEBEA6DAAA6132678653
Verified (Factored)2017-11-20kkmrkkblmbrbkA2E9D8DEBEA6DAAA6124569153
Verified2022-05-18aperson1A2E9D8DEBEA6DAAA795376553
History
DateUserTypeResult
2024-06-04Anton TsvetkovNF-PM1
B1=100000000, B2=300002623830
2022-12-20LordJuliusNF
no factor from 2^67 to 2^68
2022-12-20LordJuliusNF
no factor from 2^66 to 2^67
2022-12-20LordJuliusNF
no factor from 2^65 to 2^66
2022-12-20LordJuliusNF
no factor from 2^64 to 2^65
2022-12-20LordJuliusNF
no factor from 2^63 to 2^64
2022-05-18qtdszwsCERT
PRP Certification
Proof certified good
2022-05-18aperson1C-PRP
M2207861/13247167/242864711/794829961/17698213777/138507171375912007/8911175334151969271/769106144228752187657 : A2E9D8DEBEA6DAAA
PRP proof power = 7
PRP: Verified
Proof certified good
2022-05-18_p95holder_F-ECM
Factor: 769106144228752187657 / (ECM curve 5, B1=50000, B2=5000000)
2017-11-20kkmrkkblmbrbkC-PRP
M2207861/13247167/17698213777/242864711/794829961/138507171375912007/8911175334151969271 : A2E9D8DEBEA6DAAA
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-18Oliver KruseC-PRP
M2207861/13247167/17698213777/242864711/794829961/138507171375912007/8911175334151969271 : A2E9D8DEBEA6DAAA
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-10Oliver KruseC-PRP
M2207861/known_factors : FD0EF16C47EA4885
PRP: Verified (Factored)
PRP without proof (not generated)
2016-11-15TJAOIF
Factor: 8911175334151969271 / TF: 62-63
2016-04-15alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-05-12TJAOIF
Factor: 138507171375912007 / TF: 56-57
2008-07-14George WoltmanF-ECM
Factor: 794829961
2008-07-14George WoltmanF-ECM
Factor: 242864711
2008-07-14George WoltmanF-ECM
Factor: 17698213777