1 665 067 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
146091175978465801	18	57.0	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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
Verified (Factored)		Wayne Scott	F4AA4AB9389DE428	0
Verified (Factored)	1998-11-21	Jay Funnell	F4AA4AB9389DE428	33734

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	F55F4F99D363B4CB	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-02	Oliver Kruse	A0B9D39097F7EEA2	1	0	1	3
Verified	2017-11-02	ATH	A0B9D39097F7EEA2	1	1297477	1	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	F55F4F99D363B4CB PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-11-02	ATH	C-PRP	M1665067/146091175978465801 : A0B9D39097F7EEA2 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1665067/146091175978465801 : A0B9D39097F7EEA2 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12