1 419 809 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
63661395943	11	35.9	old
37772365573341745993	20	65.0	2018-05-02 14:09:58

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-01	Kriesel	E2F3B09817B86307	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	Oliver Kruse	02DFFB99EE5EC9C9	1	0	1	3
Verified (Factored)	2017-10-26	kkmrkkblmbrbk	02DFFB99EE5EC9C9	1	601270	1	3
Verified	2018-05-03	Battlemaxx	E2F3B09817B86307	2	1110293	5	3
Verified	2018-05-03	ATH	E2F3B09817B86307	2	570479	5	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	E2F3B09817B86307 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2018-05-03	ATH	C-PRP	M1419809/63661395943/37772365573341745993 : E2F3B09817B86307 PRP: Verified PRP without proof (not generated)
2018-05-03	Battlemaxx	C-PRP	M1419809/63661395943/37772365573341745993 : E2F3B09817B86307 PRP: Verified PRP without proof (not generated)
2018-05-02	TJAOI	F	Factor: 37772365573341745993 / TF: 65-66
2017-10-26	kkmrkkblmbrbk	C-PRP	M1419809/63661395943 : 02DFFB99EE5EC9C9 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1419809/63661395943 : 02DFFB99EE5EC9C9 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12