3 259 999 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷¹

TF target 2⁶⁴

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

P-1

B1 =	8600000
B2 =	22046060400

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	103 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Normand Plouffe	6D3EB303F2CCE63C	0
Verified	1999-06-06	Carlos E. Gomez	6D3EB303F2CCE63C	1821544

History

Date	User	Type	Result
2025-06-30	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-06-06	Sid & Andy	NF-PM1	B1=8600000, B2=22046060400
2023-05-29	Joss	NF-PM1	B1=1000000, B2=2236514280
2021-11-03	TJAOI	NF	no factor from 2^69 to 2^70
2021-02-07	ViliamF	NF	no factor from 2^68 to 2^69
2020-09-15	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2019-01-07	TJAOI	NF	no factor from 2^67 to 2^68
2017-12-28	Joss	NF-PM1	B1=449280, B2=13177261, E=6
2017-03-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-02-15	Joss	NF-PM1	B1=224640, B2=2246400, E=6
2017-02-04	Joss	NF-PM1	B1=187200
2017-01-29	Joss	NF-PM1	B1=156000
2016-12-27	Joss	NF-PM1	B1=120000
2016-07-09	Joss	NF-PM1	B1=100000, B2=3750000, E=6
2015-06-28	Tha	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
2012-12-30	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-27	Squeeky_Squirrel	NF-PM1	B1=100000, B2=1875000, E=6
2011-05-27	Rob_Dee	NF	no factor from 2^61 to 2^62
2009-04-02	S485122	NF	no factor from 2^60 to 2^61

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