2 985 949 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶⁴

TF below 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	17130872850

ECM

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

Estimated T-Level: 25.5 ⓘ

Status	Date	User	Residue	Shift
Verified		Richard Brigham	838B1C6AF82BF6A8	0
Bad	1999-05-23	Kent Lee	022C4BEAFA7B7336	1606082
Verified	1999-12-30	Mark Wiedemeier	838B1C6AF82BF6A8	2494140
Verified	2018-10-21	kkmrkkblmbrbk	838B1C6AF82BF6A8	1085210

History

Date	User	Type	Result
2023-12-28	mikr	NF-PM1	B1=10000000, B2=17130872850
2023-10-29	Joss	NF-PM1	B1=2570200, B2=5185490310
2023-10-21	Joss	NF-PM1	B1=2570200, B2=3629636010
2023-10-21	Joss	NF-PM1	B1=2570200, B2=1762610850
2023-10-20	Joss	NF-PM1	B1=2570200, B2=829114650
2023-10-20	Joss	NF-PM1	B1=2570200, B2=279583920
2023-09-26	Joss	NF-PM1	B1=1000000, B2=6146720580
2023-04-07	TJAOI	NF	no factor from 2^69 to 2^70
2023-02-04	Joss	NF-PM1	B1=1000000, B2=3035011980
2021-04-28	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-08	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2018-12-28	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-21	kkmrkkblmbrbk	C-LL	838B1C6AF82BF6A8
2017-12-04	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-10	Joss	NF-PM1	B1=396800, B2=3968000, E=6
2016-06-19	Joss	NF-PM1	B1=198400, B2=4050000, E=6
2016-02-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-11	lycorn	NF	no factor from 2^64 to 2^65
2015-04-11	lycorn	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-25	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-10-23	markr	NF-PM1	B1=100000, B2=2025000, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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