3 383 543 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 =	6200000
B2 =	22250037810

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	112 / 640

Estimated T-Level: 25.9 ⓘ

Status	Date	User	Residue	Shift
Verified		Renee	F4F3E8C56D26AC10	0
Verified	1999-06-26	Sam Robertson	F4F3E8C56D26AC10	3129215

History

Date	User	Type	Result
2025-07-26	Joss	NF-PM1	B1=10000000, B2=10019165310
2025-06-06	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-05-20	Sid & Andy	NF-PM1	B1=6200000, B2=22250037810
2023-05-13	Joss	NF-PM1	B1=1000000, B2=887672940
2021-08-21	MadPoo	NF	no factor from 2^69 to 2^70
2021-07-22	TJAOI	NF	no factor from 2^68 to 2^69
2021-05-09	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2018-10-08	TJAOI	NF	no factor from 2^67 to 2^68
2017-04-18	Joss	NF-PM1	B1=330000, B2=3300000, E=6
2017-03-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-08-13	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4372500, E=6
2015-04-01	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-12	Joss	NF-PM1	B1=97940
2014-07-04	Joss	NF-PM1	B1=78970
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-21	USAFSS	NF-PM1	B1=60000, B2=930000, E=6
2011-08-31	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-10	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-26	S485122	NF	no factor from 2^60 to 2^61

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