3 671 347 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 =	14686021350

ECM

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

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-05-08	Johannes Stahl	0C69AD1B4FF8C68F	0
Verified	1999-08-07	Ben Hampson	0C69AD1B4FF8C68F	518731

History

Date	User	Type	Result
2025-05-06	TJAOI	NF	no factor from 2^70 to 2^71
2024-08-07	Joss	NF-PM1	B1=10000000, B2=14686021350
2023-12-20	Joss	NF-PM1	B1=2366299, B2=4778283510
2023-08-31	Joss	NF-PM1	B1=1000000, B2=1257446190
2021-02-25	axn	NF	no factor from 2^69 to 2^70
2020-11-12	axn	NF	no factor from 2^68 to 2^69
2020-10-17	axn	NF-PM1	B1=30000000, B2=600000000, E=12
2018-11-05	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-28	Squeeky_Squirrel	NF-PM1	B1=230000, B2=6842500, E=12
2017-02-08	Joss	NF-PM1	B1=216345, B2=2163450, E=6
2017-01-29	Joss	NF-PM1	B1=180288
2017-01-19	Joss	NF-PM1	B1=150240
2017-01-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-12-29	Joss	NF-PM1	B1=115200
2016-12-26	Joss	NF-PM1	B1=96000
2016-12-24	Joss	NF-PM1	B1=80000
2016-10-03	Joss	NF-PM1	B1=90000, B2=3942000
2016-06-24	Joss	NF-PM1	B1=90000, B2=3285000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^60 to 2^61
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-20	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-06-05	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-02-08	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1642500, E=6
2011-06-07	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-11	Carsten Kossendey	NF-PM1	B1=20000, B2=260000

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