Emirp Calculator

What Is an Emirp?

An emirp is a prime number that remains prime when its decimal digits are reversed. For example, 17 is a prime number. When its digits are reversed, it becomes 71, which is also a prime. Therefore, 17 is an emirp.

How to Check If a Number Is an Emirp

1. Check If the Number Is a Prime: A number is considered prime if it is greater than 1 and divisible only by 1 and itself.
2. Reverse the Digits: Reverse the order of the number's digits to create a new number.
3. Check If the Reversed Number Is Prime: Verify if the reversed number is greater than 1 and divisible only by 1 and itself. If the reversed number is also prime, the original number is an emirp.

Examples

Example 1: Is 59 an Emirp?

Example 2: Is 137 an Emirp?

Example 3: Is 1021 an Emirp?

First 100 Emirps