2 853 413 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
643262042276654005897	21	69.1	2020-02-02 10:58:27

ECM

Digits	B1	Curves
25	50000	111 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Qua	53CF168F98F6B4D8	0
Verified (Factored)	2003-01-25	Edo de Roo Jankovic	53CF168F98F6B4D8	294352
Verified (Factored)	2018-09-17	kkmrkkblmbrbk	53CF168F98F6B4D8	95056

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-02-02	SRJ2877	EFE5AA5056AB6E59	1	35156	5	3
Verified	2020-02-04	daveward2005	EFE5AA5056AB6E59	1	2213453	5	3

History

Date	User	Type	Result
2020-02-04	daveward2005	C-PRP	M2853413/643262042276654005897 : EFE5AA5056AB6E59 PRP: Verified PRP without proof (not generated)
2020-02-02	SRJ2877	C-PRP	M2853413/643262042276654005897 : EFE5AA5056AB6E59 PRP: Verified PRP without proof (not generated)
2020-02-02	SRJ2877	F-ECM	Factor: 643262042276654005897 / (ECM curve 17, B1=50000, B2=5000000)
2019-10-28	masser	NF-PM1	B1=2860000, B2=28600000, E=12
2019-01-07	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-17	kkmrkkblmbrbk	C-LL	53CF168F98F6B4D8
2018-08-30	Joss	NF-PM1	B1=858008, B2=2574024, E=6
2018-08-27	Joss	NF-PM1	B1=858008, B2=1716016, E=6
2018-01-24	Joss	NF-PM1	B1=673340
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-04-01	Joss	NF-PM1	B1=324721, B2=3247210, E=6
2017-01-10	Joss	NF-PM1	B1=225501
2016-12-19	Joss	NF-PM1	B1=187918
2016-08-23	Joss	NF-PM1	B1=156599, B2=4772500, 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
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-30	markr	NF	no factor from 2^61 to 2^62
2011-02-08	markr	NF-PM1	B1=115000, B2=2386250, E=6
2011-01-26	Joss	NF-PM1	B1=50000
2011-01-03	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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