3 998 677 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷²

TF target 2⁶⁵

TF below 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	23378685330

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	73 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-04-27	John P. Kole	D03F04DAA492AC6A	0
Verified	2000-05-05	Ivan Rodionov	D03F04DAA492AC6A	874827

History

Date	User	Type	Result
2025-05-05	Kyle Askine	NF	no factor from 2^71 to 2^72
2025-02-18	Joss	NF-PM1	B1=10000000, B2=23378685330
2024-09-28	Joss	NF-PM1	B1=10000000, B2=13207884690
2022-05-17	mikr	NF-PM1	B1=5000000, B2=7218807750
2022-01-31	Joss	NF-PM1	B1=1000000, B2=1013050500
2021-06-02	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-05-21	axn	NF	no factor from 2^69 to 2^70
2020-03-13	TJAOI	NF	no factor from 2^68 to 2^69
2018-07-23	TJAOI	NF	no factor from 2^67 to 2^68
2016-12-18	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-10-21	Squeeky_Squirrel	NF-PM1	B1=245000, B2=6860000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-01-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-08-17	Squeeky_Squirrel	NF-PM1	B1=190000, B2=4845000, E=6
2014-11-25	Joss	NF-PM1	B1=86051
2013-10-08	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-17	Jayder	NF	no factor from 2^63 to 2^64
2012-02-29	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-09-19	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1190000, E=6
2010-11-03	Sid & Andy	NF	no factor from 2^61 to 2^62
2009-07-27	Carsten Kossendey	NF-PM1	B1=20000, B2=290000

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