3 369 727 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 =	6200000
B2 =	22250037810

ECM

Digits	B1	Curves
25	50000	188 / 280

Estimated T-Level: 23.4 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-03-31	Manfred Toplic	991B8C2964F83E96	0
Verified	1999-09-07	Bruce J. Wilder	991B8C2964F83E96	79273
Verified	2006-04-28	S458101	991B8C2964F83E96	79273
Verified	2017-06-12	kkmrkkblmbrbk	991B8C2964F83E96	1063813

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-09-14	fordobr	factor ECM small	C1S2	0.00 %	2025-09-15

History

Date	User	Type	Result
2025-06-07	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-05-18	Sid & Andy	NF-PM1	B1=6200000, B2=22250037810
2023-05-12	Joss	NF-PM1	B1=1000000, B2=887672940
2021-08-21	MadPoo	NF	no factor from 2^69 to 2^70
2021-08-12	TJAOI	NF	no factor from 2^68 to 2^69
2021-01-26	mikr	NF-PM1	B1=4000000, B2=150000000, E=12
2018-11-12	TJAOI	NF	no factor from 2^67 to 2^68
2017-06-12	kkmrkkblmbrbk	C-LL	991B8C2964F83E96
2017-04-07	Joss	NF-PM1	B1=330000, B2=3300000, E=6
2017-03-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-02-04	Joss	NF-PM1	B1=198000
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-25	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4331250, E=6
2015-03-30	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-23	Joss	NF-PM1	B1=93094
2014-05-21	Joss	NF-PM1	B1=74047
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-16	USAFSS	NF-PM1	B1=55000, B2=907500, E=6
2011-08-23	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-09	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-26	S485122	NF	no factor from 2^60 to 2^61

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