3 103 729 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 =	8900000
B2 =	22840692420

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	60 / 640

Estimated T-Level: 25.5 ⓘ

Status	Date	User	Residue	Shift
Verified		Gary Untermeyer	15AA608B35C0D4EE	0
Verified	1999-09-07	Todd Shepard	15AA608B35C0D4EE	539294

History

Date	User	Type	Result
2025-07-24	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-02-21	Sid & Andy	NF-PM1	B1=8900000, B2=22840692420
2022-06-15	mikr	NF	no factor from 2^69 to 2^70
2021-04-21	TJAOI	NF	no factor from 2^68 to 2^69
2019-02-04	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-14	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2017-04-11	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-09	Joss	NF-PM1	B1=269568, B2=2695680, E=6
2017-02-15	Joss	NF-PM1	B1=224640, B2=2246400, E=6
2017-02-04	Joss	NF-PM1	B1=187200
2017-01-19	Joss	NF-PM1	B1=156000
2016-12-27	Joss	NF-PM1	B1=120000
2016-08-26	Joss	NF-PM1	B1=100000, B2=4250000, E=6
2015-06-11	Tha	NF	no factor from 2^65 to 2^66
2015-02-07	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-07	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-10-25	markr	NF	no factor from 2^61 to 2^62
2011-08-21	Squeeky_Squirrel	NF-PM1	B1=100000, B2=2125000, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=180000
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61

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