3 131 017 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
585791250607262621927	21	69.0	2020-05-29 14:44:29

ECM

Digits	B1	Curves
25	50000	162 / 280

Estimated T-Level: 22.9 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Kelley	C73643984AE78129	0
Verified (Factored)	1999-08-31	Jeffrey L. Visnaw	C73643984AE78129	1841530

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-05-29	SRJ2877	55AC607D09AD2A51	1	1714677	5	3
Verified	2020-05-31	Oliver Kruse	55AC607D09AD2A51	1	55637	5	3

History

Date	User	Type	Result
2021-12-22	Joss	NF-PM1	B1=3131017, B2=637437570
2021-12-19	Joss	NF-PM1	B1=3131017, B2=108997350
2021-11-23	Joss	NF-PM1	B1=3131017
2021-02-18	Joss	NF	no factor from 2^66 to 2^67
2021-02-18	Joss	NF	no factor from 2^65 to 2^66
2021-01-18	Joss	NF-PM1	B1=702144, B2=3131017, E=6
2020-05-31	Oliver Kruse	C-PRP	M3131017/585791250607262621927 : 55AC607D09AD2A51 PRP: Verified PRP without proof (not generated)
2020-05-29	SRJ2877	C-PRP	M3131017/585791250607262621927 : 55AC607D09AD2A51 PRP: Verified PRP without proof (not generated)
2020-05-29	SRJ2877	F-ECM	Factor: 585791250607262621927 / (ECM curve 147, B1=50000, B2=5000000)
2019-01-07	TJAOI	NF	no factor from 2^67 to 2^68
2018-12-28	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2018-07-16	Joss	NF-PM1	B1=672144, B2=4032864
2018-07-15	Joss	NF-PM1	B1=672144, B2=2688576
2017-04-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-10-01	Squeeky_Squirrel	NF-PM1	B1=195000, B2=5460000, E=12
2015-06-14	Tha	NF	no factor from 2^65 to 2^66
2015-02-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-13	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-09-03	Squeeky_Squirrel	NF-PM1	B1=105000, B2=2152500, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=183750
2009-04-13	S485122	NF	no factor from 2^60 to 2^61

Username
Password