2 698 979 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 2^73 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	20000000
B2 =	54443613840

ECM

Digits	B1	Curves
25	50000	203 / 280

Estimated T-Level: 23.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-03-17	Frits van den Akker	2C32EA1C0C20A4D1	0
Verified	1999-04-13	Michael Croon	2C32EA1C0C20A4D1	2574966
Verified	2018-07-31	kkmrkkblmbrbk	2C32EA1C0C20A4D1	1798687

History

Date	User	Type	Result
2023-11-03	TJAOI	NF	no factor from 2^69 to 2^70
2023-05-30	kurly	NF-PM1	B1=20000000, B2=54443613840
2023-01-02	Joss	NF-PM1	B1=1000000, B2=449428980
2021-06-28	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-16	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-02-25	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-31	kkmrkkblmbrbk	C-LL	2C32EA1C0C20A4D1
2018-07-20	Joss	NF-PM1	B1=600000, B2=6000000, E=6
2017-09-15	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
2016-01-28	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-27	markr	NF	no factor from 2^61 to 2^62
2011-03-11	James Heinrich	NF-PM1	B1=300000, B2=8000000, E=12
2011-01-15	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-16	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61

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