GCF for 30 and 715

What is the Greatest Common Factor of 30 and 715?

Answer: GCF of 30 and 715 is 5

(Five)

Finding GCF for 30 and 715 using all factors (divisors) listing

The first method to find GCF for numbers 30 and 715 is to list all factors for both numbers and pick the highest common one:

All factors of 30: 1, 2, 3, 5, 6, 10, 15, 30

All factors of 715: 1, 5, 11, 13, 55, 65, 143, 715

So the Greatest Common Factor for 30 and 715 is 5

Finding GCF for 30 and 715 by Prime Factorization

The second method to find GCF for numbers 30 and 715 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 30: 2, 3, 5

All Prime Factors of 715: 5, 11, 13

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 30 and 715

GCF Table

Number 1Number 2GCF
157155
167151
177151
187151
197151
207155
217151
2271511
237151
247151
257155
2671513
277151
287151
297151
307155
317151
327151
3371511
347151
357155
367151
377151
387151
3971513
407155
417151
427151
437151
4471511

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 30 and 715? (The answer is: 5). Select the first number (e.g. '30') and the second number (e.g. '715'). 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 30 and 715?

GCF of 30 and 715 is 5