3 393 053 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 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	17283091980

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	89 / 640

Estimated T-Level: 25.7 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-03-17	Chionh Wei Peng	AEA743B972D8DB28	0
Verified	1999-09-22	Grzegorz Domanski	AEA743B972D8DB28	3363395

History

Date	User	Type	Result
2025-09-05	Joss	NF-PM1	B1=10000000, B2=17283091980
2025-06-05	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-05-22	Sid & Andy	NF-PM1	B1=6100000, B2=22018266270
2023-05-13	Joss	NF-PM1	B1=1000000, B2=887672940
2021-08-28	MadPoo	NF	no factor from 2^69 to 2^70
2021-07-07	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2021-06-28	TJAOI	NF	no factor from 2^68 to 2^69
2021-06-06	Numberwang	NF-PM1	B1=1000000, B2=30000000
2018-09-17	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-22	Joss	NF-PM1	B1=302354, B2=8745000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-27	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4372500, E=6
2015-04-04	Gordon Spence	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
2014-10-13	Joss	NF-PM1	B1=97832
2014-07-04	Joss	NF-PM1	B1=78916
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-23	USAFSS	NF-PM1	B1=60000, B2=945000, E=6
2011-08-19	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-10	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-27	S485122	NF	no factor from 2^60 to 2^61

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