How are prime numbers written?

Answer:
A prime number can be written as the product of that number itself and 1.
Ex: 11 = 1 X 11
79 = 1 X 79

A prime number has "exactly two distinct factors". That's why 1 is neither a prime nor composite.
First answer by Vinod Kottur. Last edit by Vinod Kottur. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].