1 865 551 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
25301859615022849943737	23	74.4	2013-02-12 21:27:54

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Borleis III	D2F34E9F166ADDC1	0
Verified (Factored)	1998-12-27	Tom Vermeulen	D2F34E9F166ADDC1	786243

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	F9BC62764647EE96	1	0	1	3
Verified	2017-11-07	kkmrkkblmbrbk	F9BC62764647EE96	1	1592901	1	3

History

Date	User	Type	Result
2017-11-07	kkmrkkblmbrbk	C-PRP	M1865551/25301859615022849943737 : F9BC62764647EE96 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1865551/25301859615022849943737 : F9BC62764647EE96 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-02-12	Xyzzy	F-ECM	Factor: 25301859615022849943737
2012-01-07	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-06	Architects Cubed	NF	no factor from 2^60 to 2^61