3 703 429 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 =	14458844400

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	86 / 640

Estimated T-Level: 25.7 ⓘ

Status	Date	User	Residue	Shift
Verified		David Campeau	47BD47AFD5FD752C	0
Verified	1999-09-30	John Milton	47BD47AFD5FD752C	1429173

History

Date	User	Type	Result
2025-05-07	Architects Cubed	NF	no factor from 2^70 to 2^71
2024-10-10	Joss	NF-PM1	B1=10000000, B2=14458844400
2023-12-18	Joss	NF-PM1	B1=2358078, B2=4881856980
2023-09-02	Joss	NF-PM1	B1=1000000, B2=1508917410
2021-04-24	axn	NF-PM1	B1=14000000, B2=700000000
2021-03-02	axn	NF	no factor from 2^69 to 2^70
2020-12-16	axn	NF	no factor from 2^68 to 2^69
2019-01-21	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-29	Squeeky_Squirrel	NF-PM1	B1=235000, B2=6932500, E=12
2017-03-28	Joss	NF-PM1	B1=300000, B2=3000000, E=6
2017-01-29	Joss	NF-PM1	B1=180000
2016-10-29	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
2016-02-23	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-20	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-20	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-04-19	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-04-10	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-09-01	James Hintz	NF-PM1	B1=150000, B2=2500000, E=6
2009-07-04	Carsten Kossendey	NF-PM1	B1=20000, B2=260000
2009-03-06	S485122	NF	no factor from 2^60 to 2^61

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