Prime numbers are the biggest and oldest data set in mathematics. Why have they captivated mathematicians for millennia?
Prime numbers are a mathematical mystery.
We don't know what knowledge we'll need in the future, and that's where maths research comes in.
The largest known prime number has been discovered. But what does it all mean?
If you know a bit about how numbers are made then you don't need to work out all 144 calculations in a 12 by 12 times table.