1 576 579 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
7881960899014607	16	52.8	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	Type	Base
Verified (Factored)	2025-09-02	Kriesel	1E1ABA38BB140ADB	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-01	Oliver Kruse	E8E9F1755715ECCD	1	0	1	3
Verified	2017-10-31	kkmrkkblmbrbk	E8E9F1755715ECCD	1	372283	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	1E1ABA38BB140ADB PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-10-31	kkmrkkblmbrbk	C-PRP	M1576579/7881960899014607 : E8E9F1755715ECCD PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1576579/7881960899014607 : E8E9F1755715ECCD PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12