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Prime Number Calculator

Written by:
PK

Below is a prime number calculator, which will tell you if a number you input is a prime. If it isn't, it'll list the factors of the number.

Also see the closely related prime factorization calculator.

Prime Number Calculator

What is a Prime Number?

A prime number is a positive integer or natural number which cannot be divided evenly by any other integers other than itself and 1.

Prime numbers have many applications, including in factoring and cryptography.

Using the Prime Number Calculator

To use the prime value calculator, enter the number you'd like to check in the Number to Check for Prime box. Then, click the Is it a Prime Number? button.

We'll tell you if its a prime in the text box below. If it is not a prime number, we'll also include the factors we found.

Afterwards, try our other calculators and tools.

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