4 083 479 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
8166959	7	23.0	old
42518834331889055599	20	65.2	2018-07-25 09:30:38

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)	2017-11-13	kkmrkkblmbrbk	B392E83B867D43CF	1	2579909	5	3
Verified (Factored)	2018-01-11	Oliver Kruse	B392E83B867D43CF	1	318939	5	3
Verified	2018-07-27	_p95holder_	B392E83B867D43CF	2	2923309	5	3

History

Date	User	Type	Result
2022-10-10	USAFSS	NF-PM1	B1=200000, B2=135233670
2018-07-27	_p95holder_	C-PRP	M4083479/8166959/42518834331889055599 : B392E83B867D43CF PRP: Verified PRP without proof (not generated)
2018-07-25	TJAOI	F	Factor: 42518834331889055599 / TF: 65-66
2018-01-11	Oliver Kruse	C-PRP	M4083479/8166959 : B392E83B867D43CF PRP: Verified PRP without proof (not generated)
2017-11-13	kkmrkkblmbrbk	C-PRP	M4083479/8166959 : B392E83B867D43CF PRP: Verified PRP without proof (not generated)