Prime Number Checker & Factorization
Check if a number is prime, see its prime factorization, all divisors and the next and previous primes.
About Prime Number Checker & Factorization
A prime number has exactly two divisors: 1 and itself. Enter any whole number up to 10¹⁵ to check whether it is prime, see its prime factorization (for example 360 = 2³ × 3² × 5), its divisors, and the nearest primes.
How to use the Prime Number Checker & Factorization — step-by-step guide
Frequently asked questions
Is Prime Number Checker & Factorization free?
Yes. Prime Number Checker & Factorization on Apex Tool Station is 100% free with no signup and no watermark. Browser tools have no usage limits.
Are my files or data uploaded to a server?
No. Everything runs locally in your browser using JavaScript. Your files and text never leave your device, which makes it safe for private documents.
Does it work on mobile?
Yes. The tool works on any modern browser on Android, iPhone, Windows, Mac and Linux.