Math Tool

Prime Number Checker

Check if a number is prime or composite. Find prime factors, generate lists of prime numbers in a range, and learn about prime factorization. Perfect for math homework and number theory.

Mode

Check Single Number Find Primes in Range

Number to Check

Enter a positive integer between 1 and 10,000,000 to check if it is prime.

Learn More About Prime Numbers

Understand prime numbers and their importance in mathematics:

Beginner Guide

What Are Prime Numbers?

Understanding prime numbers and why they matter in math

Q&A Post

Prime Factorization Explained

How to break down numbers into prime factors

Q&A Post

Largest Known Prime Numbers

Fascinating facts about prime numbers and Mersenne primes