3 363 839 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 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	6200000
B2 =	22250037810

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	112 / 640

Estimated T-Level: 25.9 ⓘ

Status	Date	User	Residue	Shift
Verified		Ty Cage Warren	FE861224BAEC1817	0
Verified	1999-09-22	Jeroen Ensink	FE861224BAEC1817	1401632

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-08-20	-Anonymous-	factor ECM small		0.00 %	2025-08-20

History

Date	User	Type	Result
2025-06-10	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-05-16	Sid & Andy	NF-PM1	B1=6200000, B2=22250037810
2023-05-11	Joss	NF-PM1	B1=1000000, B2=887672940
2022-10-10	TJAOI	NF	no factor from 2^69 to 2^70
2021-08-11	MadPoo	NF	no factor from 2^68 to 2^69
2020-12-10	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2018-11-26	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-04	ramgeis	NF	no factor from 2^65 to 2^66
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
2015-02-25	David Campeau	NF-PM1	B1=1300000, B2=39000000, E=12
2015-02-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=95282
2014-06-09	Joss	NF-PM1	B1=76201
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-15	USAFSS	NF-PM1	B1=55000, B2=907500, E=6
2011-09-03	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-06	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-27	S485122	NF	no factor from 2^60 to 2^61

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