1 301 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
161317830296866767945829203107381353	36	117.0	old
3172016620920990460580749619964431858642380903	46	151.2	2011-12-13 19:36:06

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-11-16	kkmrkkblmbrbk	PRP_PRP_PRP_PRP_	2	746	1	3
Factored	No proof (small exponent)	2017-12-07	ATH	PRP_PRP_PRP_PRP_	2	771	1	3

History

Date	User	Type	Result
2017-12-07	ATH	P-PRP	M1301/161317830296866767945829203107381353/3172016620920990460580749619964431858642380903 PRP Cofactor
2017-11-16	kkmrkkblmbrbk	P-PRP	M1301/161317830296866767945829203107381353/3172016620920990460580749619964431858642380903 PRP Cofactor
2011-12-13	Michael Kenn	F-ECM	Factor: 3172016620920990460580749619964431858642380903
2000-07-17	-anonymous-	NF	no factor TF: 1-56
2000-01-19	-anonymous-	NF	no factor TF: 54-55
1998-08-09	-anonymous-	NF	no factor TF: 51-53
1998-05-01	Alex Kruppa	NF	no factor TF: 49-51
1998-04-27	Alex Kruppa	NF	no factor TF: 49-51