The Greatest Common Factor (GCF) [also called the Greatest Common Divisor or GCD] is the largest positive integer that is a factor of two or more numbers. For example, the GCF of 14 and 21 is 7. It can be written GCF(14, 21) = 7.
greatest common factor. The largest integer factor that two or more numbers have in common. The GCF is most often used to simplify fractions.
greatest common factor. the largest factor that two or more numbers have in common. i.e. the GCF of 8 and 12 is 4.
Greatest Common Factor. The greatest number that is a factor of every number in a set of numbers or expressions. 3 is the greatest common factor of 9 and 15.