2 793 407 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 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	53074734
B2 =	1284463520340

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	123 / 640

Estimated T-Level: 26.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Florian Herzig	D4343DAA26601C1B	0
Verified	1999-07-30	Stephen Scott	D4343DAA26601C1B	2475679
Verified	2018-08-29	kkmrkkblmbrbk	D4343DAA26601C1B	2340886

History

Date	User	Type	Result
2024-12-02	yuriy_5-1	NF-PM1	B1=53074734, B2=1284463520340
2023-10-06	TJAOI	NF	no factor from 2^69 to 2^70
2023-03-07	Architects Cubed	NF-PM1	B1=5000000, B2=8681331750
2023-01-27	Joss	NF-PM1	B1=1000000, B2=432341910
2021-06-28	TJAOI	NF	no factor from 2^68 to 2^69
2019-12-13	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-02-26	chuenkit	NF	no factor from 2^67 to 2^68
2018-08-29	kkmrkkblmbrbk	C-LL	D4343DAA26601C1B
2017-10-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-30	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-06	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-09	ramgeis	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
2014-11-03	Joss	NF-PM1	B1=122977
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-07	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-22	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-14	Joss	NF-PM1	B1=15000
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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