5 560 169 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
173947795999306161487	21	67.2	2015-07-01 16:36:14

ECM

Digits	B1	Curves
25	50000	6 / 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
Bad	1999-08-22	Randy Given	482E1EDB71EBECCC	5242933
Verified (Factored)	2000-08-31	Sebastien Massy	7FC31E6AA8F20C02	254469
Verified (Factored)	2001-07-17	Kari Hyvönen	7FC31E6AA8F20C02	4741832

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	9D1305B6848ACAFA	1	0	1	3
Verified	2018-07-06	ATH	9D1305B6848ACAFA	1	5440438	1	3

History

Date	User	Type	Result
2018-07-06	ATH	C-PRP	M5560169/173947795999306161487 : 9D1305B6848ACAFA PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M5560169/173947795999306161487 : 9D1305B6848ACAFA PRP: Verified PRP without proof (not generated)
2015-07-01	Sid & Andy	F-ECM	Factor: 173947795999306161487
2014-12-17	monst	NF	no factor from 2^64 to 2^65
2014-12-16	Nesowa	NF	no factor from 2^63 to 2^64
2010-11-28	Squeeky_Squirrel	NF-PM1	B1=65000, B2=1023750, E=6
2009-04-23	GrunwalderGIMP	NF	no factor from 2^62 to 2^63