Imagine a concept so simple you learnt about it in primary school, but so complex that you can earn a $1 million prize for solving a problem related to it. It’s puzzled the greatest mathematical brains for thousands of years, and there are computers solely dedicated to it. I’m talking about prime numbers. But why are they such a big deal - after all it's just a name for a certain type of number, so why are we so obsessed with them over other numbers? Well it’s actually so complex that this is going to be a two parter episode to finish this season of Schrödinger's Chat, so buckle up and, let’s begin!