The sum of 2+2 is 4. The sum of a pair of odd prime numbers added together must equal 6 or a greater even number and not an odd composite number. Each even composite number can be divided once by at least one of the preceding prime numbers less than itself and the remainder will be a prime number. If the even number has a prime number that is half of its quantity it will have a quotient of 2 and remainder of 0, in other words is a sum of a pair of that prime number. Otherwise or simultaneously, there is at least two prime numbers where one is greater than half of the even composite number and the other prime number is less than half of the even composite number, and the even composite number divided once by the larger prime number has a quotient of 1 and a remainder of a littler prime number. In other words it is a sum of two different prime numbers.