Prime Number Checker
Check if any number is prime. A prime number has exactly two factors: 1 and itself.
What is a Prime Number?
A prime number is a natural number greater than 1 that has exactly two factors: 1 and itself. It cannot be divided evenly by any other number.
First 25 Prime Numbers
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
Fun Facts
2 is the only even prime number. There are infinitely many primes. Prime numbers are used in cryptography to secure online transactions.