Welcome to the Math Salamanders Prime Numbers Calculator page.

Check out to see if you have found a prime number using our Prime Number Tester, find the factors of a number and
print out some of our pre-prepared prime number lists here.

Input any value into our Find Primes Calculator and it will find all the primes up to and including your value.

You can then take this information and copy and paste it into a prime numbers chart somewhere else if you wish!

Use our prime number calculator to see whether a number is prime or not.

This calculator will also tell you what the factors of your number are.

It will also give your number as a product of prime factors.

We have several pre-prepared prime numbers lists for you to print.

Prime Numbers Charts to ...

Take a look at some more of our worksheets similar to these.

The Sieve of Erastosthenes is a method for finding what is a prime numbers between 2 and any given number.

Eratosthenes was a Greek mathematician (as well as being a poet, an astronomer and musician) who lived from about 276BC to 194BC.

If you want to find out more about his sieve for finding primes, and print out some Sieve of Eratosthenes worksheets, use the link below.

Take a look at our Prime Number page which clearly describes what a prime numbers is and what they are not.

There are also many different questions about prime numbers answered, as well as information about the density of primes.

We have a wide range of free math calculators to help you.

Most of our calculators show you their working out so that you can see exactly what they have done to get the answer.

Our calculator hub page contains links to all of our calculators!

How to Print or Save these sheets

Need help with printing or saving?

Follow these 3 easy steps to get your worksheets printed out perfectly!

How to Print or Save these sheets

Need help with printing or saving?

Follow these 3 easy steps to get your worksheets printed out perfectly!

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The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

We welcome any comments about our site or worksheets on the Facebook comments box at the bottom of every page.

Check out our NEW Halloween worksheets.

We have Halloween dot-to-dot and Halloween color-by-number sheets.

Looking for some fun printable math games?

We have some great games for you to play in our Math Games e-books!

Do you know how old you are...in weeks? days? hours?

Are you more than a million minutes old?

Find out how old you are to the nearest second!

Have a look at some of our most popular pages to see different Math activities and ideas you could use with your child

- Reverse Percentage Calculator
- List of Geometric Shapes
- Equivalent Fractions
- 3d Geometric Shapes
- Perimeter Worksheets

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