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Prime Number Checker

Check if a number is prime and see its prime factors.

Enter a Number

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. The algorithm tests divisibility up to the square root of the number.

About Prime Checker

Prime Checker determines whether any integer is a prime number and, if not, lists its factors. It also shows the nearest primes on either side of the input. This tool is perfect for math students, programmers, and anyone exploring number theory.

  • Checks primality instantly
  • Lists all factors if composite
  • Shows nearest prime numbers
  • Works with large integers

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