1 082 447 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
285766009	9	28.1	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	104 / 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	982AE20412A85025	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	9C68CE187C0A0352	1	0	1	3
Verified	2017-10-16	Oliver Kruse	9C68CE187C0A0352	1	459718	1	3
Verified	2018-01-02	ATH	9C68CE187C0A0352	1	27925	1	3

History

Date	User	Type	Result
2025-09-01	LOBES	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	982AE20412A85025 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2024-08-22	cramsey87	NF-PM1	B1=3000000, B2=22221719520
2018-01-02	ATH	C-PRP	M1082447/285766009 : 9C68CE187C0A0352 PRP: Verified PRP without proof (not generated)
2017-10-16	Oliver Kruse	C-PRP	M1082447/285766009 : 9C68CE187C0A0352 PRP: Verified PRP without proof (not generated)
2017-09-28	Oliver Kruse	C-PRP	M1082447/285766009 : 9C68CE187C0A0352 PRP: Verified PRP without proof (not generated)