In arithmetic, as well as in many cases in everyday English, "common" means
"same for both".
A "common factor" is a number that's a factor of both of two numbers.
A single number can't have a "common" factor
Just like I couldn't tell you "the difference between a potato".
The greatest common factor of 89 and 33 is 1.
The Greatest Common Factor (GCF) is: 1
It is: 1
8811
It is: 1
The GCF of 89 and 98 is 1.
The greatest common factor of the numbers 89 and 64 is 1.
The GCF is 1.
The GCF is 1.
It is: 1
The GCF is 1.
The GCF is 1.