6 455 623 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
5478646024428440851723925204618691551	37	122.0	2014-09-17 14:59:47

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	Shift
Verified (Factored)	2000-01-04	Jan Otto Munch Pedersen	D69D7084DF1897C3	0
Verified (Factored)	2001-04-15	D. Waller	D69D7084DF1897C3	6208035

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-17	Chun sung soo	25E93000BE0C14D8	1	5383912	5	3
Verified	2018-07-23	kkmrkkblmbrbk	25E93000BE0C14D8	1	5034867	5	3

P-1 factors

Date	Factor	B1	B2
2014-09-17	5478646024428440851723925204618691551	395000	9973750

History

Date	User	Type	Result
2022-03-20	LordJulius	NF	no factor from 2^62 to 2^63
2018-07-23	kkmrkkblmbrbk	C-PRP	M6455623/5478646024428440851723925204618691551 : 25E93000BE0C14D8 PRP: Verified PRP without proof (not generated)
2017-12-17	Chun sung soo	C-PRP	M6455623/5478646024428440851723925204618691551 : 25E93000BE0C14D8 PRP: Verified PRP without proof (not generated)
2014-09-17	Nesowa	F-PM1	Factor: 5478646024428440851723925204618691551 / (P-1, B1=395000, B2=9973750, E=12)
2014-08-06	lycorn	NF	no factor from 2^64 to 2^65
2014-08-02	Nesowa	NF	no factor from 2^63 to 2^64