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
2843671Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
356441150132989567224166092684.92023-09-18 23:14:52
ECM
DigitsB1Curves
2550000145 / 280
Estimated T-Level: 22.6 ⓘ
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Antti MerihaaraC533CECF441386E40
Verified (Factored)Paul Victor NovareseC533CECF441386E40
Verified (Factored)1999-08-22Hgin normaalilyseoC533CECF441386E42324404
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-09-19Naegi Makoto271DFFD8B09F62B91192864353
P-1 factors
DateFactorB1B2
2023-09-183564411501329895672241660910000006339076590
History
DateUserTypeResult
2023-09-19twmossCERT
PRP Certification
Proof certified good
2023-09-19Naegi MakotoC-PRP
M2843671/35644115013298956722416609 : 271DFFD8B09F62B9
PRP proof power = 7
PRP: Verified
Proof certified good
2023-09-18JossF-PM1
Factor: 35644115013298956722416609 / (P-1, B1=1000000, B2=6339076590)
2023-08-25TJAOINF
no factor from 2^69 to 2^70
2023-05-23JossNF-PM1
B1=1000000, B2=3034351320
2021-07-15TJAOINF
no factor from 2^68 to 2^69
2020-02-06masserNF-PM1
B1=5000000, B2=200000000, E=12
2019-10-30masserNF-PM1
B1=2850000, B2=28500000, E=12
2019-01-05chuenkitNF
no factor from 2^67 to 2^68
2017-11-04Gordon SpenceNF
no factor from 2^66 to 2^67
2017-06-28JossNF-PM1
B1=390000, B2=3900000, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-14ramgeisNF
no factor from 2^65 to 2^66
2015-04-21VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-21VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2012-02-07Grant McCrackenNF
no factor from 2^61 to 2^62
2012-01-12Squeeky_SquirrelNF-PM1
B1=195000, B2=4875000, E=6
2011-01-24JossNF-PM1
B1=50000
2009-02-13Sturle SundeNF
no factor from 2^60 to 2^61
2008-10-28Jayson KingNF-PM1
B1=35000, B2=560000