1 431 581 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
223609578275345480695951	24	77.6	2014-02-12 22:21:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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)		Alex and Nick Myrman	519	0
Verified (Factored)		Kevin Jaget	56C620CD2D22BD19	0
Verified (Factored)	2002-10-19	Mark Outhier	56C620CD2D22BD19	781003

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	Oliver Kruse	54A51F31260405A1	1	0	1	3
Verified	2017-10-27	kkmrkkblmbrbk	54A51F31260405A1	1	1381271	1	3

History

Date	User	Type	Result
2017-10-27	kkmrkkblmbrbk	C-PRP	M1431581/223609578275345480695951 : 54A51F31260405A1 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1431581/223609578275345480695951 : 54A51F31260405A1 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-02-12	bam	F-ECM	Factor: 223609578275345480695951
2011-05-07	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2009-08-08	markr	NF-PM1	B1=200000, B2=5000000, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61