ELI5: Explain Like I'm 5

Prime geodesic

Okay, let's imagine you're on a playground and you have a huge ball. You throw the ball really far and it rolls all the way down the slide. Now, let's pretend that slide is like a curved path in space, called a geodesic. Every point on that path is important because if you're on it, you can only move in a certain direction that keeps you on the path.

Now, let's add something called prime numbers to our playground. A prime number is a number that can only be divided evenly by 1 and itself, with nothing left over. We can think of prime geodesics as special paths on our playground that only cross over prime numbers.

Just like our ball rolling down the slide, these prime geodesics have a specific direction and they can only follow a path that stays on these prime numbers. And just like on the slide, every point on the prime geodesic is important because it helps keep you on that path of prime numbers.

So, essentially, a prime geodesic is a special path in space that follows prime numbers, and it's important because it helps mathematicians study the properties of these special numbers.