GCF for 55 and 77

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 55 and 77?

Answer: GCF of 55 and 77 is 11

(Eleven)

Finding GCF for 55 and 77 using all factors (divisors) listing

The first method to find GCF for numbers 55 and 77 is to list all factors for both numbers and pick the highest common one:

All factors of 55: 1, 5, 11, 55

All factors of 77: 1, 7, 11, 77

So the Greatest Common Factor for 55 and 77 is 11

Finding GCF for 55 and 77 by Prime Factorization

The second method to find GCF for numbers 55 and 77 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 55: 5, 11

All Prime Factors of 77: 7, 11

As we can see there is only one Prime Factor common to both numbers. It is 11

So 11 is the Greatest Common Factor of 55 and 77

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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 Divisor of 55 and 77? (The answer is: 11). Select the first number (e.g. '55') and the second number (e.g. '77'). 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

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
40771
41771
42777
43771
447711
45771
46771
47771
48771
49777
50771
51771
52771
53771
54771
557711
56777
57771
58771
59771
60771
61771
62771
63777
64771
65771
667711
67771
68771
69771

FAQ

What is the Greatest common Divisor of 55 and 77?

GCF of 55 and 77 is 11

See Also