2 525 123 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
56708403673767807007	20	65.6	2015-08-02 00:57:55

ECM

Digits	B1	Curves
25	50000	15 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ed Knapton	BE05760E69B90145	0
Verified (Factored)	1999-04-23	David Ellis	BE05760E69B90145	2055351

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-14	kkmrkkblmbrbk	61B6A55987991EAD	1	2293625	5	3
Verified	2017-11-08	Oliver Kruse	61B6A55987991EAD	1	1303240	5	3

History

Date	User	Type	Result
2023-01-28	USAFSS	NF-PM1	B1=288000, B2=290589390
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-08	Oliver Kruse	C-PRP	M2525123/56708403673767807007 : 61B6A55987991EAD PRP: Verified PRP without proof (not generated)
2017-10-14	kkmrkkblmbrbk	C-PRP	M2525123/56708403673767807007 : 61B6A55987991EAD PRP: Verified PRP without proof (not generated)
2015-08-02	guru	F-ECM	Factor: 56708403673767807007 / (ECM curve 3, B1=50000, B2=5000000)
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
2012-06-13	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-03-12	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
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61