Prime Numbers Chart and Calculator
A Prime Number is:
a whole number that cannot be made by multiplying other whole numbers
(if we can make it by multiplying other whole numbers it is a Composite Number)
And 1 is not prime and also not composite.
Here we see it in action:
Here is a list of all the prime numbers up to 1,000:
- Is 8 a Prime Number? No, because it can be made by 2×4=8
- Is 73 a Prime Number? Yes, as no other whole numbers multiply together to make it.
Calculator ... Is It Prime?
Find out if a number is Prime or not (works on numbers up to 4,294,967,295):
You can also try this Prime Numbers Activity.