3 816 103 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 2^73 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	13986682710

ECM

Digits	B1	Curves
25	50000	201 / 280

Estimated T-Level: 23.6 ⓘ

Status	Date	User	Residue	Shift
Verified		David Newhall	54E6CA2B6CC47D55	0
Verified	1999-12-01	Vernon Selvidge	54E6CA2B6CC47D55	1131106

History

Date	User	Type	Result
2024-12-20	TJAOI	NF	no factor from 2^70 to 2^71
2024-07-03	Joss	NF-PM1	B1=10000000, B2=13986682710
2024-01-03	Joss	NF-PM1	B1=2329977, B2=5118553440
2022-05-02	DRobinsonPE	NF	no factor from 2^69 to 2^70
2021-01-03	axn	NF-PM1	B1=15000000, B2=750000000
2020-10-26	TJAOI	NF	no factor from 2^68 to 2^69
2018-10-08	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-08-14	Joss	NF-PM1	B1=222393, B2=4447860, E=6
2016-03-05	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-01-28	Joss	NF-PM1	B1=222393, B2=2223930, E=6
2015-01-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-20	Joss	NF-PM1	B1=81819
2012-03-23	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-11-03	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1121250, E=6
2011-03-24	markr	NF	no factor from 2^61 to 2^62
2009-07-24	Carsten Kossendey	NF-PM1	B1=20000, B2=270000
2009-02-27	S485122	NF	no factor from 2^60 to 2^61

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