2 243 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 5 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
22373457765765203287	20	64.3	old
1621855608482099266985412989105443846107961	43	140.2	2011-12-18 18:44:09
33584291626555988192435097466513894803912161	44	144.6	2009-03-02 21:34:55
25505344904088339250306780569062170259580500303	47	154.2	2012-06-08 22:22:05
6669478815648360567032338704138470582022170609473	49	162.2	2009-03-02 21:34:54

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-11-09	kkmrkkblmbrbk	PRP_PRP_PRP_PRP_	5	1872	1	3

History

Date	User	Type	Result
2017-11-09	kkmrkkblmbrbk	P-PRP	M2243/22373457765765203287/1621855608482099266985412989105443846107961/33584291626555988192435097466513894803912161/25505344904088339250306780569062170259580500303/6669478815648360567032338704138470582022170609473 PRP Cofactor
2012-06-08	Michael Kenn	F-ECM	Factor: 25505344904088339250306780569062170259580500303
2011-12-18	Matthias Wurtinger	F-ECM	Factor: 1621855608482099266985412989105443846107961
2009-03-02	-anonymous-	F-ECM	Factor: 33584291626555988192435097466513894803912161
2009-03-02	-anonymous-	F-ECM	Factor: 6669478815648360567032338704138470582022170609473