3 300 967 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 =	16990330
B2 =	16782131520

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	77 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-04-27	Christian Räber	D99EF5B8908E5B78	0
Verified	1999-07-04	James Arnold	D99EF5B8908E5B78	1748069

History

Date	User	Type	Result
2025-06-21	Architects Cubed	NF	no factor from 2^70 to 2^71
2024-11-09	Joss	NF-PM1	B1=16990330, B2=16782131520
2024-01-07	Joss	NF-PM1	B1=2469126, B2=5445460020
2024-01-07	Joss	NF-PM1	B1=2469126, B2=2644922280
2023-08-26	Joss	NF-PM1	B1=1000000, B2=1983691710
2019-07-30	GdS	NF-PM1	B1=21013663, B2=840546516, E=12
2019-07-29	GdS	NF	no factor from 2^69 to 2^70
2019-07-29	GdS	NF	no factor from 2^68 to 2^69
2018-12-10	TJAOI	NF	no factor from 2^67 to 2^68
2018-08-11	Joss	NF-PM1	B1=410000, B2=4100000
2018-08-08	Joss	NF-PM1	B1=410000, B2=2050000
2018-08-08	Joss	NF-PM1	B1=410000, B2=1640000
2018-08-07	Joss	NF-PM1	B1=410000, B2=1230000
2018-08-06	Joss	NF-PM1	B1=410000, B2=820000
2017-02-21	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-29	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-02-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-11-12	Squeeky_Squirrel	NF-PM1	B1=205000, B2=4612500, E=6
2012-08-25	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-09-29	USAFSS	NF-PM1	B1=55000, B2=880000, E=6
2011-09-14	markr	NF	no factor to 2^62
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-03-31	S485122	NF	no factor from 2^60 to 2^61

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