The Greatest Common Factor (GCF) for 72 and 96, notation CGF(72,96), is 24.
Explanation:
The factors of 72 are 1,2,3,4,6,8,9,12,18,24,36,72;
The factors of 96 are 1,2,3,4,6,8,12,16,24,32,48,96.
So, as we can see, the Greatest Common Factor or Divisor is 24, because it is the greatest number that divides evenly into all of them.