Loading tool...
Calculate Greatest Common Divisor and Least Common Multiple of multiple numbers. Shows prime factorization and common divisors.
Advanced calculator with scientific functions and history
Plot and visualize mathematical functions with multiple overlays
Type any positive integer and find out instantly whether it is prime. The tool also returns the prime factorization of composite numbers, so you see exactly which primes multiply together to produce the input.
Quickly verify whether a number is prime and check factorizations.
Explore prime numbers and factorization, the foundation of RSA encryption.
The tool handles numbers up to several billion efficiently. Extremely large numbers may take a moment.
No. By mathematical convention, 1 is neither prime nor composite.
All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.