Greatest Common Divisor (GCD) of 107 and 139
The greatest common divisor (GCD) of 107 and 139 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 107 and 139?
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 | 107 ÷ 139 = 0 remainder 107 |
| 2 | 139 ÷ 107 = 1 remainder 32 |
| 3 | 107 ÷ 32 = 3 remainder 11 |
| 4 | 32 ÷ 11 = 2 remainder 10 |
| 5 | 11 ÷ 10 = 1 remainder 1 |
| 6 | 10 ÷ 1 = 10 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 69 and 31 | 1 |
| 157 and 128 | 1 |
| 160 and 90 | 10 |
| 77 and 66 | 11 |
| 26 and 77 | 1 |