1 091 687 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
5093333863436281	16	52.2	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 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	DEDB070754A44B26	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	EAC01DD6CA8D87CA	1	0	1	3
Verified	2017-10-16	Oliver Kruse	EAC01DD6CA8D87CA	1	1026109	1	3
Verified	2017-12-31	ATH	EAC01DD6CA8D87CA	1	225307	1	3

History

Date	User	Type	Result
2025-09-02	PASHyREy	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	DEDB070754A44B26 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2024-10-06	timc995	NF-PM1	B1=2000000, B2=63130867800
2017-12-31	ATH	C-PRP	M1091687/5093333863436281 : EAC01DD6CA8D87CA PRP: Verified PRP without proof (not generated)
2017-10-16	Oliver Kruse	C-PRP	M1091687/5093333863436281 : EAC01DD6CA8D87CA PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1091687/5093333863436281 : EAC01DD6CA8D87CA PRP: Verified PRP without proof (not generated)