9 986 831 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
55425793524929	14	45.7	old
121706681916718737031	21	66.7	2020-08-13 12:21:52

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	PRP without proof (not generated)	2019-12-02	mnd9	F716F2740F3FB306	1	4949233	5	3
Verified	Certified Good	2020-08-13	storm5510	F716F2740F3FB306	2	7133369	5	3

History

Date	User	Type	Result
2025-09-03	Elysia	NF-PM1	B1=5630518, B2=10723240710
2020-08-14	xx005fs	CERT	Proof certified good
2020-08-13	storm5510	C-PRP	M9986831/55425793524929/121706681916718737031 : F716F2740F3FB306 Proof Certified Good Proof Power: 8
2020-08-13	TJAOI	F	Factor: 121706681916718737031
2019-12-02	mnd9	C-PRP	M9986831/55425793524929 : F716F2740F3FB306