About Prime Number Tool
The Prime Number Tool checks whether any number is prime, finds the nth prime number, lists all primes in a given range, and performs prime factorization of any integer. It uses BigInt to support very large numbers. All calculation runs locally in your browser.
Features
- Primality test for any number
- Find the nth prime number
- List all primes in a given range
- Prime factorization of any integer
- BigInt support for very large numbers
Frequently Asked Questions
How large a number can I test?
The tool uses trial division and BigInt, so it handles numbers up to several dozen digits, though very large composites may take longer.
What is a prime number?
A prime number is a whole number greater than 1 that has exactly two divisors: 1 and itself.