Greatest Common Divisor (GCD) of 131 and 79
The greatest common divisor (GCD) of 131 and 79 is 1.
What is the Greatest Common Divisor (GCD)?
The GCD of two integers is the largest positive integer that divides both numbers without leaving a remainder. It is useful in simplifying fractions, finding common factors, and in number theory.
How to Calculate the GCD of 131 and 79?
We use the Euclidean algorithm, which involves the following steps:
- Divide the larger number by the smaller number.
- Replace the larger number with the smaller number and the smaller number with the remainder from the division.
- Repeat this process until the remainder is zero.
- The non-zero remainder just before zero is the GCD.
Step-by-Step Euclidean Algorithm
| Step | Calculation |
|---|---|
| 1 | 131 ÷ 79 = 1 remainder 52 |
| 2 | 79 ÷ 52 = 1 remainder 27 |
| 3 | 52 ÷ 27 = 1 remainder 25 |
| 4 | 27 ÷ 25 = 1 remainder 2 |
| 5 | 25 ÷ 2 = 12 remainder 1 |
| 6 | 2 ÷ 1 = 2 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 164 and 102 | 2 |
| 142 and 105 | 1 |
| 120 and 128 | 8 |
| 158 and 82 | 2 |
| 197 and 138 | 1 |