2 849 669 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4337711041506358026433367	25	81.8	2021-06-15 20:22:06

ECM

Digits	B1	Curves
25	50000	87 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		The Feenster	F2400BDBE9176CB0	0
Verified (Factored)	1999-10-29	Nick Hilliard	F2400BDBE9176CB0	374389
Verified (Factored)	2018-09-16	kkmrkkblmbrbk	F2400BDBE9176CB0	2490628

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-18	Daniil Tsarkov	61652B1481312E68	1	2713849	5	3

History

Date	User	Type	Result
2021-06-18	frederikhk	CERT	PRP Certification Proof certified good
2021-06-18	Daniil Tsarkov	C-PRP	M2849669/4337711041506358026433367 : 61652B1481312E68 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-15	LaurV	F-ECM	Factor: 4337711041506358026433367 / (ECM curve 4, B1=50000, B2=6750000, Sigma=328241424547949)
2019-11-01	masser	NF-PM1	B1=2850000, B2=28500000, E=12
2019-01-07	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-16	kkmrkkblmbrbk	C-LL	F2400BDBE9176CB0
2017-11-05	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-06-09	Joss	NF-PM1	B1=375000, B2=3750000, E=6
2017-01-10	Joss	NF-PM1	B1=225000
2016-09-12	Joss	NF-PM1	B1=187500, B2=3059375, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-16	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-03	markr	NF	no factor from 2^61 to 2^62
2011-02-02	markr	NF-PM1	B1=125000, B2=2781250, E=6
2011-01-26	Joss	NF-PM1	B1=50000
2011-01-02	Joss	NF-PM1	B1=30000
2010-12-22	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=157500
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61

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