Primes
An integer p greater than 1 is called prime iff the only positive factors
An integer that is greater than 1 and is not prime is called composite.
There are 25 primes less than 100:
31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
The special sort of positive integers, called prime numbers, play a
very important role in cryptology, the study of secret messages.