2 865 199 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
11817234908424445843954129303	29	93.3	2023-04-16 21:21:52

ECM

Digits	B1	Curves
25	50000	138 / 280

Estimated T-Level: 22.5 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Jeffrey L. Vagle	168108C506BF28F6	0
Verified (Factored)	1999-05-09	Jussi Mahkonen	168108C506BF28F6	2699569
Verified (Factored)	2018-09-19	kkmrkkblmbrbk	168108C506BF28F6	2498868

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-04-16	Naegi Makoto	59E0CAF2EA5862D9	1	1264369	5	3

P-1 factors

Date	Factor	B1	B2
2023-04-16	11817234908424445843954129303	1000000	1406609820

History

Date	User	Type	Result
2023-04-16	Steve Jacobson	CERT	PRP Certification Proof certified good
2023-04-16	Naegi Makoto	C-PRP	M2865199/11817234908424445843954129303 : 59E0CAF2EA5862D9 PRP proof power = 7 PRP: Verified Proof certified good
2023-04-16	Joss	F-PM1	Factor: 11817234908424445843954129303 / (P-1, B1=1000000, B2=1406609820)
2021-06-07	TJAOI	NF	no factor from 2^68 to 2^69
2020-03-10	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-24	masser	NF-PM1	B1=2870000, B2=28700000, E=12
2019-01-08	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-19	kkmrkkblmbrbk	C-LL	168108C506BF28F6
2018-08-30	Joss	NF-PM1	B1=848008, B2=2544024, E=6
2018-08-27	Joss	NF-PM1	B1=848008, B2=1696016, E=6
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-04-04	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
2016-08-25	Joss	NF-PM1	B1=156599, B2=4830000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-18	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
2012-01-28	markr	NF	no factor from 2^61 to 2^62
2011-02-09	markr	NF-PM1	B1=115000, B2=2415000, E=6
2011-01-21	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-21	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

Username
Password