It is a prime.
3 is a prime.
111 is a multiple of 3. Due to this, 111 is not prime and IS composite.
It is composite.
363 = 3 times 121 and is therefore composite and not prime.
3 is prime. Rest are composite.
...prime
prime
prime
Composite. 147 * 3
3 is prime 15 is composite
3 is a prime number