What is the greatest common factor of 34 and 60?

The greatest common factor of 34 and 60 is 2

34 = 2 x 17

60 = 2^2 x 3 x 5

The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.