Explore one of the great ‘unsolved mathematics’ problems. The humble beginnings make this problem accessible to upper primary level mathematics: “Every even number greater than two can be written as the sum of two prime numbers”. Students start by exploring two digit numbers, then they apply some relatively simple coding commands to write a basic program that makes exploration quicker. One of the beauties of this unsolved mathematics problem is that it is easy to escalate the mathematics and coding aspects to provide a challenge to a broad range of students.