1 653 427 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
246019855928073121	18	57.8	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	134 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Alex and Nick Myrman	135E	0
Verified (Factored)	1998-12-21	Kent Lee	88C7044392FA135E	595983

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	354CAE9EF4EAC92D	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-02	Oliver Kruse	57FFD7FC5438F953	1	0	1	3
Verified	2017-11-02	ATH	57FFD7FC5438F953	1	965710	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	354CAE9EF4EAC92D PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-11-02	ATH	C-PRP	M1653427/246019855928073121 : 57FFD7FC5438F953 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1653427/246019855928073121 : 57FFD7FC5438F953 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12