9 899 891 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
19799783	8	24.2	old
123970736562683761943	21	66.7	2020-08-26 11:29:46

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	PRP without proof (not generated)	2019-11-14	mnd9	91941BB8D49579C8	1	2817581	5	3
Verified	Certified Good	2020-08-26	storm5510	91941BB8D49579C8	2	2595960	5	3

History

Date	User	Type	Result
2026-02-12	cherubrock	NF-PM1	B1=1260000
2020-08-26	Ben Delo	CERT	Proof certified good
2020-08-26	storm5510	C-PRP	M9899891/19799783/123970736562683761943 : 91941BB8D49579C8 Proof Certified Good Proof Power: 8
2020-08-26	TJAOI	F	Factor: 123970736562683761943
2019-11-14	mnd9	C-PRP	M9899891/19799783 : 91941BB8D49579C8