GCF for 100 and 655

What is the Greatest Common Factor of 100 and 655?

Answer: GCF of 100 and 655 is 5

(Five)

Finding GCF for 100 and 655 using all factors (divisors) listing

The first method to find GCF for numbers 100 and 655 is to list all factors for both numbers and pick the highest common one:

All factors of 100: 1, 2, 4, 5, 10, 20, 25, 50, 100

All factors of 655: 1, 5, 131, 655

So the Greatest Common Factor for 100 and 655 is 5

Finding GCF for 100 and 655 by Prime Factorization

The second method to find GCF for numbers 100 and 655 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 100: 2, 2, 5, 5

All Prime Factors of 655: 5, 131

As we can see there is only one Prime Factor common to both numbers. It is 5

So 5 is the Greatest Common Factor of 100 and 655

GCF Table

Number 1Number 2GCF
856555
866551
876551
886551
896551
906555
916551
926551
936551
946551
956555
966551
976551
986551
996551
1006555
1016551
1026551
1036551
1046551
1056555
1066551
1076551
1086551
1096551
1106555
1116551
1126551
1136551
1146551

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 100 and 655? (The answer is: 5). Select the first number (e.g. '100') and the second number (e.g. '655'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 100 and 655?

GCF of 100 and 655 is 5