1 775 549 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
42429200016623968927	20	65.2	2013-06-09 05:02:33

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)		Russ Nelson	817162CBE2DFAB10	0
Verified (Factored)	1999-03-15	Michael Boss	817162CBE2DFAB10	470814

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-03	Oliver Kruse	F4216C0D7C8C9C63	1	0	1	3
Verified	2017-11-04	kkmrkkblmbrbk	F4216C0D7C8C9C63	1	508408	1	3

History

Date	User	Type	Result
2017-11-04	kkmrkkblmbrbk	C-PRP	M1775549/42429200016623968927 : F4216C0D7C8C9C63 PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1775549/42429200016623968927 : F4216C0D7C8C9C63 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-06-09	Chang Chia-Tche	F-ECM	Factor: 42429200016623968927
2011-02-09	Carsten Kossendey	NF-PM1	B1=95000, B2=1615000, E=6
2010-12-13	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-19	Architects Cubed	NF	no factor from 2^60 to 2^61