3 403 639 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 2^74 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	16281171060

ECM

Digits	B1	Curves
25	50000	205 / 280

Estimated T-Level: 23.7 ⓘ

Status	Date	User	Residue	Shift
Verified		Peter Brundel	EBB5E47CE1D8B0CA	0
Verified	1999-10-15	Jakub Klawiter	EBB5E47CE1D8B0CA	2163574

History

Date	User	Type	Result
2025-05-20	Architects Cubed	NF	no factor from 2^70 to 2^71
2024-10-11	Joss	NF-PM1	B1=10000000, B2=16281171060
2023-12-30	Joss	NF-PM1	B1=2439059, B2=5135190060
2023-08-27	Joss	NF-PM1	B1=1000000, B2=1604743140
2022-09-27	TJAOI	NF	no factor from 2^69 to 2^70
2021-03-31	axn	NF-PM1	B1=15000000, B2=750000000
2021-01-03	Dylan Delgado	NF-PM1	B1=1600000, B2=66000000
2020-12-26	axn	NF	no factor from 2^68 to 2^69
2019-02-18	TJAOI	NF	no factor from 2^67 to 2^68
2017-01-26	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
2015-04-06	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-01-30	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-30	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-08-18	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-27	markr	NF-PM1	B1=225000, B2=5737500, E=12
2011-08-10	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-25	S485122	NF	no factor from 2^60 to 2^61

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