3 479 557 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 =	25948082160

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	82 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-08-30	Christopher Hamlyn	2131559C19463E9C	0
Verified	1999-09-30	Gintautas Miliauskas	2131559C19463E9C	2453146

History

Date	User	Type	Result
2025-06-28	Joss	NF-PM1	B1=10000000, B2=25948082160
2025-02-07	TJAOI	NF	no factor from 2^70 to 2^71
2024-05-08	Joss	NF-PM1	B1=10000000, B2=15851575740
2023-04-24	Sid & Andy	NF-PM1	B1=9200000, B2=17675494200
2022-04-06	TJAOI	NF	no factor from 2^69 to 2^70
2022-01-15	mikr	NF-PM1	B1=5000000, B2=405000000
2021-11-14	Aaron Haviland	NF-PM1	B1=1500000, B2=30000000, e=12
2021-01-10	axn	NF	no factor from 2^68 to 2^69
2018-11-12	TJAOI	NF	no factor from 2^67 to 2^68
2017-02-18	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
2016-01-05	ramgeis	NF	no factor from 2^65 to 2^66
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
2014-09-27	HBendtz	NF-PM1	B1=500000, B2=10000000, E=12
2014-08-21	Joss	NF-PM1	B1=78446
2012-08-18	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-11-13	USAFSS	NF-PM1	B1=60000, B2=990000, E=6
2011-07-22	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-07	Carsten Kossendey	NF-PM1	B1=20000, B2=240000
2009-03-20	S485122	NF	no factor from 2^60 to 2^61

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