2 802 143 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

2802143

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶³

TF below 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	20890273950

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	70 / 640

Estimated T-Level: 25.5 ⓘ

Status	Date	User	Residue	Shift
Verified		SubZ	157F90DA478B4D7A	0
Verified	1999-05-02	Matthew Gauthier	157F90DA478B4D7A	542211
Verified	2018-09-01	kkmrkkblmbrbk	157F90DA478B4D7A	1697546

History

Date	User	Type	Result
2024-01-09	mikr	NF-PM1	B1=10000000, B2=20890273950
2023-10-20	Joss	NF-PM1	B1=2636354, B2=5765609850
2023-10-19	Joss	NF-PM1	B1=2636354, B2=2873961090
2023-10-19	Joss	NF-PM1	B1=2636354, B2=1246214970
2023-10-18	Joss	NF-PM1	B1=2636354, B2=432341910
2023-09-20	Joss	NF-PM1	B1=1000000, B2=6426988260
2023-08-01	Joss	NF-PM1	B1=1000000, B2=3122249130
2023-05-16	Joss	NF-PM1	B1=1000000, B2=1494511200
2022-10-20	Architects Cubed	NF	no factor from 2^69 to 2^70
2021-06-14	TJAOI	NF	no factor from 2^68 to 2^69
2020-01-01	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-11-13	masser	NF-PM1	B1=3000000, B2=30000000, E=12
2018-12-30	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-01	kkmrkkblmbrbk	C-LL	157F90DA478B4D7A
2018-05-01	Joss	NF-PM1	B1=2802143, B2=5604286, E=6
2017-10-24	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-08-01	Joss	NF-PM1	B1=1611229, B2=3222458, E=6
2016-05-08	Numberwang	NF-PM1	B1=15000, B2=135000
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-01-08	omylist	NF	no factor from 2^65 to 2^66
2015-07-07	Joss	NF-PM1	B1=1611229
2015-06-25	Joss	NF-PM1	B1=1464754
2015-06-08	Joss	NF-PM1	B1=1331595
2015-05-22	Joss	NF-PM1	B1=1210541
2015-05-07	Joss	NF-PM1	B1=1100492
2015-05-01	Joss	NF-PM1	B1=1000448
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
2015-04-08	Joss	NF-PM1	B1=826818
2015-03-29	Joss	NF-PM1	B1=751653
2015-03-14	Joss	NF-PM1	B1=621201
2015-03-14	Joss	NF-PM1	B1=564729
2015-02-23	Joss	NF-PM1	B1=466719
2015-02-15	Joss	NF-PM1	B1=424290
2015-02-11	Joss	NF-PM1	B1=350654
2015-02-03	Joss	NF-PM1	B1=217730
2015-02-01	Joss	NF-PM1	B1=197937
2015-01-30	Joss	NF-PM1	B1=179943
2015-01-26	Joss	NF-PM1	B1=148714
2014-11-10	Joss	NF-PM1	B1=122905
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-27	c10ck3r	NF	no factor from 2^61 to 2^62
2010-11-20	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-12	Joss	NF-PM1	B1=15000
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61

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