4 871 821 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
590683552573193903	18	59.0	old
42692491073976418249	20	65.2	2018-07-26 12:46:45

ECM

Digits	B1	Curves
25	50000	3 / 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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	61B4F1DCE941F980	1	0	1	3
Verified (Factored)	2018-03-31	ATH	61B4F1DCE941F980	1	3923962	1	3
Verified	2018-07-31	_p95holder_	6483E610E4BD0973	2	4676709	5	3
Verified	2018-07-31	Oliver Kruse	6483E610E4BD0973	2	3512302	5	3

History

Date	User	Type	Result
2023-08-19	USAFSS	NF-PM1	B1=256000, B2=105522060
2018-07-31	Oliver Kruse	C-PRP	M4871821/590683552573193903/42692491073976418249 : 6483E610E4BD0973 PRP: Verified PRP without proof (not generated)
2018-07-31	_p95holder_	C-PRP	M4871821/590683552573193903/42692491073976418249 : 6483E610E4BD0973 PRP: Verified PRP without proof (not generated)
2018-07-26	TJAOI	F	Factor: 42692491073976418249 / TF: 65-66
2018-03-31	ATH	C-PRP	M4871821/590683552573193903 : 61B4F1DCE941F980 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4871821/590683552573193903 : 61B4F1DCE941F980 PRP: Verified PRP without proof (not generated)