This program demonstrates Goldbach's conjecture.
"Goldbach's conjecture is one of the oldest and best-known unsolved problems in number theory and in all of mathematics. It states:
Every even integer greater than 2 can be expressed as the sum of two primes."
Read more at: https://en.wikipedia.org/wiki/Goldbach%27s_conjecture
To find all the prime numbers I used a method called "Sieve of Eratosthenes"
Read more at: https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes