Greatest Common Divisor (GCD) of 71 and 181
The greatest common divisor (GCD) of 71 and 181 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 71 and 181?
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 | 71 ÷ 181 = 0 remainder 71 |
| 2 | 181 ÷ 71 = 2 remainder 39 |
| 3 | 71 ÷ 39 = 1 remainder 32 |
| 4 | 39 ÷ 32 = 1 remainder 7 |
| 5 | 32 ÷ 7 = 4 remainder 4 |
| 6 | 7 ÷ 4 = 1 remainder 3 |
| 7 | 4 ÷ 3 = 1 remainder 1 |
| 8 | 3 ÷ 1 = 3 remainder 0 |
Examples of GCD Calculations
| Numbers | GCD |
|---|---|
| 146 and 18 | 2 |
| 149 and 20 | 1 |
| 59 and 21 | 1 |
| 110 and 152 | 2 |
| 72 and 124 | 4 |