9 874 103 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
19748207	8	24.2	old
2018128415759	13	40.9	2008-09-30 23:58:32
649323225493129179265951	24	79.1	2022-07-30 03:25:00

ECM

Digits	B1	Curves
25	50000	81 / 280

Estimated T-Level: 21.4 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2020-09-10	riccardo uberti	4E4D486D5BBDBB73	2	6385190	5	3
Verified (Factored)	2021-02-09	Oliver Kruse	4E4D486D5BBDBB73	2	8989883	5	3
Verified	2022-07-31	riccardo uberti	4E4D486D5BBDBB73	3	9726034	5	3

History

Date	User	Type	Result
2022-08-01	riccardo uberti	NF-PP1	Start=6/5, B1=2300000, B2=60000000
2022-07-31	Waritko	CERT	PRP Certification Proof certified good
2022-07-31	riccardo uberti	C-PRP	M9874103/19748207/2018128415759/649323225493129179265951 : 4E4D486D5BBDBB73 PRP proof power = 8 PRP: Verified Proof certified good
2022-07-30	riccardo uberti	F-PP1	Start=2/7, B1=2000000, B2=50000000, Factor: 649323225493129179265951
2021-02-09	Ben Delo	CERT	PRP Certification Proof certified good
2021-02-09	Oliver Kruse	C-PRP	M9874103/19748207/2018128415759 : 4E4D486D5BBDBB73 PRP proof power = 8 PRP: Verified (Factored) Proof certified good
2020-09-10	riccardo uberti	C-PRP	M9874103/19748207/2018128415759 : 4E4D486D5BBDBB73 PRP: Verified (Factored) PRP without proof (not generated)
2008-09-30	markr	F	Factor: 2018128415759