4 854 439 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
17398264593033223639	20	63.9	2010-03-29 23:38:25

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
Bad	1999-08-16	Santiago Moros Vela	0A14470286463EBD	668439
Verified (Factored)	2001-01-14	Jim S. McCann,mccannj@uswes	332AB374F9D55D47	3126910
Verified (Factored)	2001-05-06	Anton Rebhan	332AB374F9D55D47	4772307

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	55BCEC02D9E226C8	1	0	1	3
Verified	2018-03-30	ATH	55BCEC02D9E226C8	1	336537	1	3

History

Date	User	Type	Result
2023-04-11	Kevin_9611	NF-PM1	B1=320000, B2=224341260
2018-03-30	ATH	C-PRP	M4854439/17398264593033223639 : 55BCEC02D9E226C8 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4854439/17398264593033223639 : 55BCEC02D9E226C8 PRP: Verified PRP without proof (not generated)
2010-03-29	S00030	F-ECM	Factor: 17398264593033223639