2 876 813 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
7127028148713992657807	22	72.6	2021-11-25 19:28:45

ECM

Digits	B1	Curves
25	50000	97 / 280

Estimated T-Level: 21.7 ⓘ

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

Status	Date	User	Residue	Shift
Bad	1997-11-11	Luke Welsh	153D5AE7934D67DE	0
Verified (Factored)	1999-05-16	MIT Prime Team	893138841F5F735B	104819
Verified (Factored)	1999-11-17	Pim Klingens	893138841F5F735B	1989932
Verified (Factored)	2018-09-23	kkmrkkblmbrbk	893138841F5F735B	80724

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-12-01	Poao	6C3562485A50F350	1	1835695	5	3

History

Date	User	Type	Result
2021-12-01	David A. McGough	CERT	PRP Certification Proof certified good
2021-12-01	Poao	C-PRP	M2876813/7127028148713992657807 : 6C3562485A50F350 PRP proof power = 7 PRP: Verified Proof certified good
2021-11-25	daveward2005	F-ECM	Factor: 7127028148713992657807 / (ECM curve 4, B1=50000, B2=5000000, Sigma=8564805020846750)
2021-05-19	TJAOI	NF	no factor from 2^68 to 2^69
2020-03-05	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-23	masser	NF-PM1	B1=2880000, B2=28800000, E=12
2019-01-10	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-23	kkmrkkblmbrbk	C-LL	893138841F5F735B
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-06-28	Joss	NF-PM1	B1=390000, B2=3900000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-02-19	Yxinity	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
2012-01-20	markr	NF	no factor from 2^61 to 2^62
2011-09-27	markr	NF-PM1	B1=195000, B2=4923750, E=6
2011-01-23	Joss	NF-PM1	B1=50000
2010-12-24	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=161250
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61

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