Tag Archives: greatest common factor

From GPGCF to GCF … in two easy steps

For any pair of numbers, how to find the GCF once you know the GPGCF.

Recent insight on the GCF (and GPGCF)

Two factors limit the size of the GCF for any two numbers. Those factors are: 1) the difference between the two numbers, and 2) the size of the smaller of the two numbers. Whichever of these two factors is smaller is the Greatest Possible Greatest Common Factor, also known as the GPGCF.