Numbers are divided into many categories. Like, From where the number starts, what is the power of the number, what is the sign with the number, etc.
Now prime numbers and composite numbers are differentiated on the basis of the point, that how many times they comes in any certain table and in what table they come.
Prime numbers- prime numbers are numbers which do not come in any other table. These numbers are only present in their own table and in the table of 1.
Example - 2, 3, 5, 7, 11, 13, 17, 23......and so on.
Composite number- composite numbers are numbers which can come in any table. These numbers are not only present in their own table and in the table of one but you can see them in any certain table.
Example- 4, ,6, 8, 9, 10, 12, 14, 15, 16, 18, ......and so on.