Prime Number Chart

Below you’ll find our printable prime number charts. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. In other words, a prime number cannot be formed by multiplying any two numbers other than 1 and itself.

The first few prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, and so on.

To determine whether a number is prime, you need to check if it has any divisors other than 1 and itself. If a number has divisors other than these, it is not prime; otherwise, it is prime.

We’ve included six different Prime Number Charts below to help your students learn what numbers are prime.

Be sure to also check out our Greatest Common Factor Calculator!

Resource Details

Age(s): 8 - 11
Grade(s): 3rd Grade to 6th Grade
6 Printable PDF Resources
No Answer Key

More Information About Prime Numbers

It’s not necessary to memorize all prime numbers, especially since they go on infinitely. However, having a general understanding of prime numbers and knowing some of the smaller ones (up to a certain point) can be beneficial in various areas of mathematics and computer science. Some reasons why prime numbers are important are:

Cryptography: Prime numbers play a crucial role in modern cryptography, which is essential for secure communication and data protection on the internet.
Number theory: Prime numbers are at the heart of number theory, a branch of mathematics that deals with properties and relationships between numbers.
Factorization: Prime factorization is the process of expressing a number as a product of prime numbers, and it is used in many mathematical computations.
Algorithms: Some algorithms in computer science and cryptography rely on prime numbers for their efficiency and security.
Randomness: In some applications, prime numbers are used to generate random numbers, as they exhibit certain properties desirable for randomness

Prime Number Charts

Below you will find prime number charts including all prime and composite numbers up to 20, up to 50, and up to 100. We have printables with all prime numbers highlighted in color. We also have options that are in black and white.