2 289 697 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶²

TF below 2^75 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	9600000
B2 =	49498834770

ECM

Digits	B1	Curves
25	50000	234 / 280

Estimated T-Level: 24.2 ⓘ

Status	Date	User	Residue	Shift
Verified		Luigi Morelli	4B04CDDCDEB72A96	0
Verified	1998-10-25	Tom Cage	4B04CDDCDEB72A96	1246579
Verified	2018-04-28	kkmrkkblmbrbk	4B04CDDCDEB72A96	126832

History

Date	User	Type	Result
2024-03-15	TJAOI	NF	no factor from 2^69 to 2^70
2023-08-24	Sid & Andy	NF-PM1	B1=9600000, B2=49498834770
2023-07-11	Joss	NF-PM1	B1=1000000, B2=3799936140
2023-03-13	Joss	NF-PM1	B1=1000000, B2=1647746100
2022-12-19	Joss	NF-PM1	B1=1000000, B2=571651080
2021-06-24	TJAOI	NF	no factor from 2^68 to 2^69
2021-04-03	Dylan Delgado	NF-PM1	B1=900000, B2=61200000
2019-06-24	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-28	kkmrkkblmbrbk	C-LL	4B04CDDCDEB72A96
2017-05-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-04-07	Joss	NF-PM1	B1=743920, B2=7439200, E=12
2017-04-04	Joss	NF-PM1	B1=619934, B2=6199340, E=12
2017-04-01	Joss	NF-PM1	B1=516612, B2=5166120, E=6
2017-03-28	Joss	NF-PM1	B1=430510, B2=4305100, E=6
2017-03-24	Joss	NF-PM1	B1=358759, B2=3587590, E=6
2017-02-25	Joss	NF-PM1	B1=298966, B2=2989660, E=6
2016-10-07	Joss	NF-PM1	B1=144179, B2=15728640, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-02	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-12	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-12	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-11	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password