3 373 267 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 =	6200000
B2 =	22271479230

ECM

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

Estimated T-Level: 25.7 ⓘ

Status	Date	User	Residue	Shift
Verified		Jonathan Larmour	7794DB3BE313F39C	0
Verified	1999-07-04	Frederick D. Mackie	7794DB3BE313F39C	2078836

History

Date	User	Type	Result
2025-06-09	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-05-02	Sid & Andy	NF-PM1	B1=6200000, B2=22271479230
2021-08-21	MadPoo	NF	no factor from 2^69 to 2^70
2021-08-01	Joss	NF	no factor from 2^68 to 2^69
2021-02-23	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2018-11-05	TJAOI	NF	no factor from 2^67 to 2^68
2017-04-12	Joss	NF-PM1	B1=330000, B2=3300000, E=6
2017-03-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-08-05	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4331250, E=6
2015-03-30	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=98054
2014-06-24	Joss	NF-PM1	B1=79027
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-17	USAFSS	NF-PM1	B1=60000, B2=930000, E=6
2011-08-18	markr	NF	no factor from 2^61 to 2^62
2009-07-09	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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