It is neither. The concept of prime or composite is relevant for whole numbers greater than 1.
Try dividing it by 5....
composite
85 is composite.
85 is a composite number because it has more than two factors whereas prime numbers have only two factors
85 is not a prime number because it is divisible by 5. This means it is a composite number.
85 is a composite number85 is not a prime number because it has more than two factors.
43 is a 2 digit odd number but it is a prime number
composite because it has more than two factors.
All of them except for 89 which is a prime number
neither prime or composite
It is prime