I regret that we have no means of knowing what you may have said! Furthermore, the greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.
The GCF is 80.
The GCF is 8.
The GCF is 4.
gcf of 80 and 100 is 20.The GCF is 20.
The GCF is 16.
The GCF is 1.
The GCF is 80.
The GCF is 40.
The GCF is 1.
The GCF is 10.
GCF(4060, 80) = 20.
The GCF is 8.