2 500 051 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶³

TF below 2^75 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	100000000
B2 =	100858818060

ECM

Digits	B1	Curves
25	50000	222 / 280

Estimated T-Level: 24.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Kees Hoogakker	C58E2E341198EC61	0
Verified	1999-05-02	Bruce A Metcalf	C58E2E341198EC61	431840
Verified	2018-04-25	gunhed	C58E2E341198EC61	1449203
Verified	2018-06-02	kkmrkkblmbrbk	C58E2E341198EC61	944053

History

Date	User	Type	Result
2024-12-08	timc995	NF-PM1	B1=100000000, B2=100858818060
2024-01-09	Joss	NF-PM1	B1=2759435, B2=15551324250
2024-01-08	Joss	NF-PM1	B1=2759435, B2=7666134630
2024-01-02	Numberwang	NF-PM1	B1=250000, B2=965060460
2023-12-10	Joss	NF-PM1	B1=2759435, B2=2847407640
2023-09-05	Numberwang	NF-PM1	B1=166000
2023-08-26	Joss	NF-PM1	B1=1000000, B2=5220276600
2022-10-22	Architects Cubed	NF	no factor from 2^69 to 2^70
2021-07-05	TJAOI	NF	no factor from 2^68 to 2^69
2019-05-27	TJAOI	NF	no factor from 2^67 to 2^68
2019-03-29	Joss	NF-PM1	B1=25000510, B2=2500051000, E=12
2018-06-02	kkmrkkblmbrbk	C-LL	C58E2E341198EC61
2018-04-25	gunhed	C-LL	C58E2E341198EC61
2017-07-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-19	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2015-10-07	omylist	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-11	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-28	James Heinrich	NF-PM1	B1=165000, B2=3918750, E=6
2011-01-19	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2010-12-16	Joss	NF-PM1	B1=20000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61

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