Prime numbers : The numbers whose factors are 1 and the number itself is called
Prime numbers.
Example :
2,3,5,7,11,13,…
2 is the smallest even prime number and 3 is the smallest odd prime number.
Composite Number
: The number which has at least one factor other than 1 and the number itself.
Example : 4,6,8,9,12,…
Smallest prime number = 2
Smallest composite number = 4
Factors of 2 are 1 and 2
Factors of 4 are 1, 2 and 4
Highest common factor (HCF) = 2
*please note that “1” is neither prime nor composite*