2 531 993 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶³

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

P-1

B1 =	10000000
B2 =	20133835260

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	71 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified		Ed Knapton	D19BF4DFD8052D4F	0
Verified	1999-04-02	Peter Cornell	D19BF4DFD8052D4F	815424
Verified	2018-06-08	kkmrkkblmbrbk	D19BF4DFD8052D4F	1966639

History

Date	User	Type	Result
2025-05-27	Joss	NF-PM1	B1=10000000, B2=20133835260
2025-03-27	Joss	NF-PM1	B1=10000000, B2=10050107760
2024-04-12	TJAOI	NF	no factor from 2^69 to 2^70
2024-01-03	Numberwang	NF-PM1	B1=242000, B2=923354250
2023-12-11	Joss	NF-PM1	B1=2745458, B2=5913870270
2023-11-07	Joss	NF-PM1	B1=2745458, B2=2847407640
2023-02-06	Architects Cubed	NF-PM1	B1=5000000, B2=8646469650
2023-01-29	Joss	NF-PM1	B1=2531993, B2=457236780
2021-06-03	TJAOI	NF	no factor from 2^68 to 2^69
2019-07-01	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-12	mikr	NF-PM1	B1=5000000, B2=200000000, E=12
2018-06-08	kkmrkkblmbrbk	C-LL	D19BF4DFD8052D4F
2018-05-14	Joss	NF-PM1	B1=2531993, B2=5063986, E=6
2017-08-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-14	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-03-22	James Heinrich	NF-PM1	B1=300000, B2=8000000, E=12
2011-01-06	Joss	NF-PM1	B1=50000
2011-01-02	Joss	NF-PM1	B1=30000
2010-12-19	Joss	NF-PM1	B1=20000
2009-04-02	Rob_Dee	NF	no factor from 2^60 to 2^61

Username
Password