2, 3, 5, 7, 11, 13, 17, 19...


Where Prime Numbers mysteries are solved.

Are these prime numbers?

Click the links below to read an explanation about whether these numbers are prime. If you'd like to see a chart with these numbers, please view our primes numbers 1-20 chart. If you'd like to learn more about what makes a number prime, please view our explanation of prime numbers.