5 428 427 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
40552644928004392751	20	65.1	2015-04-10 00:36:17

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)	1998-08-02	Bryan Koen	E44BA407810D9A2F	0
Bad	2000-10-15	Thomas F. Dely	A42837139596870C	3816740
Verified (Factored)	2001-12-22	S59777	E44BA407810D9A2F	812904
Verified (Factored)	2002-01-02	Roy Oswald	E44BA407810D9A2F	812904

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-01	kkmrkkblmbrbk	D6A5080E4BE7EA2D	1	2463790	5	3
Verified	2018-06-24	Martin Russell	D6A5080E4BE7EA2D	1	1760382	5	3

History

Date	User	Type	Result
2018-06-24	Martin Russell	C-PRP	M5428427/40552644928004392751 : D6A5080E4BE7EA2D PRP: Verified PRP without proof (not generated)
2017-12-01	kkmrkkblmbrbk	C-PRP	M5428427/40552644928004392751 : D6A5080E4BE7EA2D PRP: Verified PRP without proof (not generated)
2015-04-10	Sid & Andy	F-ECM	Factor: 40552644928004392751
2015-01-03	monst	NF	no factor from 2^64 to 2^65
2015-01-02	Nesowa	NF	no factor from 2^63 to 2^64
2010-10-25	Squeeky_Squirrel	NF-PM1	B1=60000, B2=960000, E=6
2009-05-13	GrunwalderGIMP	NF	no factor from 2^62 to 2^63