2 953 859 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶⁴

TF below 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	19214984250

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Victor Lee	0B8456CB2D6A8A34	0
Verified	1999-05-30	Sami Sundell	0B8456CB2D6A8A34	2598514
Verified	2018-10-13	kkmrkkblmbrbk	0B8456CB2D6A8A34	2895847

History

Date	User	Type	Result
2023-06-22	TJAOI	NF	no factor from 2^69 to 2^70
2023-03-10	mikr	NF-PM1	B1=10000000, B2=19214984250
2022-08-27	Wentao Huang	NF-PM1	B1=1290000, B2=3770897130
2021-05-12	TJAOI	NF	no factor from 2^68 to 2^69
2018-12-24	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-13	kkmrkkblmbrbk	C-LL	0B8456CB2D6A8A34
2017-11-28	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-09-05	Joss	NF-PM1	B1=1072715, B2=22000000, E=12
2016-02-26	ramgeis	NF	no factor from 2^65 to 2^66
2015-05-08	VictordeHollander	NF-PM1	B1=1000000, B2=20000000, E=12
2015-05-01	Joss	NF-PM1	B1=975196
2015-04-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2015-04-08	Joss	NF-PM1	B1=805948
2015-03-29	Joss	NF-PM1	B1=732680
2015-03-14	Joss	NF-PM1	B1=605521
2015-03-12	Joss	NF-PM1	B1=550474
2015-03-02	Joss	NF-PM1	B1=500431
2015-02-25	Joss	NF-PM1	B1=454938
2015-02-04	Joss	NF-PM1	B1=413580
2015-02-01	Joss	NF-PM1	B1=187991
2015-01-31	Joss	NF-PM1	B1=170901
2015-01-26	Joss	NF-PM1	B1=141241
2014-11-12	Joss	NF-PM1	B1=116729
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-12-18	markr	NF	no factor from 2^61 to 2^62
2010-11-02	markr	NF-PM1	B1=95000, B2=1995000, E=6
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password