GCF for 77 and 121
What is the Greatest Common Divisor of 77 and 121?
Answer
(Eleven)
Finding GCF for 77 and 121 using all factors (divisors) listing
The first method to find GCF for numbers 77 and 121 is to list all factors for both numbers and pick the highest common one:
All factors of 77: 1, 7, 11, 77
All factors of 121: 1, 11, 121
So the Greatest Common Factor for 77 and 121 is 11
Finding GCF for 77 and 121 by Prime Factorization
The second method to find GCF for numbers 77 and 121 is to list all Prime Factors for both numbers and multiply the common ones:
All Prime Factors of 77: 7, 11
All Prime Factors of 121: 11, 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 77 and 121
Related Calculations
See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
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GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 62 | 121 | 1 |
| 63 | 121 | 1 |
| 64 | 121 | 1 |
| 65 | 121 | 1 |
| 66 | 121 | 11 |
| 67 | 121 | 1 |
| 68 | 121 | 1 |
| 69 | 121 | 1 |
| 70 | 121 | 1 |
| 71 | 121 | 1 |
| 72 | 121 | 1 |
| 73 | 121 | 1 |
| 74 | 121 | 1 |
| 75 | 121 | 1 |
| 76 | 121 | 1 |
| 77 | 121 | 11 |
| 78 | 121 | 1 |
| 79 | 121 | 1 |
| 80 | 121 | 1 |
| 81 | 121 | 1 |
| 82 | 121 | 1 |
| 83 | 121 | 1 |
| 84 | 121 | 1 |
| 85 | 121 | 1 |
| 86 | 121 | 1 |
| 87 | 121 | 1 |
| 88 | 121 | 11 |
| 89 | 121 | 1 |
| 90 | 121 | 1 |
| 91 | 121 | 1 |
About "Greatest Common Factor" Calculator
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.