Prime numbers are whole numbers which cannot be produced by multiplying whole numbers. They are always greater than 1. A number which can be produced by multiplying whole numbers is called a composite number. The number 4 is an example of a composite number. It can be produced by multiplying 2x2.
Here is a list of all the prime numbers up to 100:
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.
The number 2 is the smallest prime number. It cannot be produced by multiplying whole numbers. The numbers 4 and 1/2 can be muliplied to produce 2, but 1/2 is not a whole number. It is a fraction.
With the exception of the number 2, all the prime numbers are odd numbers. Even numbers such as 4 and 10 can be produced by multiplying 2 and another whole number. Numbers which can be produced by multiplying whole numbers are called composite numbers.
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