5 153 257 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
115295150381575580299314553	27	86.6	2014-07-26 11:43:26

ECM

Digits	B1	Curves
25	50000	5 / 280

Estimated T-Level: 20.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-09-06	Roy Stroup	0E6EFFE9D8A56604	0
Verified (Factored)	2000-08-17	Henrik Oluf Olsen	0E6EFFE9D8A56604	259718

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	19008D8FF5EEF4B4	1	0	1	3
Verified	2018-05-21	Oliver Kruse	19008D8FF5EEF4B4	1	4272675	1	3

History

Date	User	Type	Result
2018-05-21	Oliver Kruse	C-PRP	M5153257/115295150381575580299314553 : 19008D8FF5EEF4B4 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M5153257/115295150381575580299314553 : 19008D8FF5EEF4B4 PRP: Verified PRP without proof (not generated)
2014-07-26	bam	F-ECM	Factor: 115295150381575580299314553
2009-09-26	USAFSS	NF-PM1	B1=55000, B2=935000, E=6
2009-06-25	GrunwalderGIMP	NF	no factor from 2^62 to 2^63
2008-10-11	Sturle Sunde	NF	no factor from 2^61 to 2^62