Prime Number Checker
Check if any number is prime, find its factors, and discover the nearest prime numbers above and below
How to Use This Tool
In Check mode, enter any positive number to find out if it's prime.
For non-prime numbers, the tool shows the complete prime factorization.
View the nearest prime numbers on either side.
Switch to Generate mode to list all primes up to N or the first N primes.
About This Tool
Prime Number Checker instantly determines whether any number is prime and provides the complete prime factorization for composite numbers. Find the nearest prime numbers on either side of your input. The Generate mode lists all primes up to a given limit or produces the first N primes. Handles numbers up to several million.
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