Have you ever heard of a prime number, buddy? No? Well, a prime number is a special number that can only be divided by 1 and itself - no other numbers can go into it evenly. For example, 2, 3, 5, and 7 are all prime numbers.
Now, let's talk about the Wolstenholme prime. It's named after a guy named Joseph Wolstenholme who was a really smart mathematician. The Wolstenholme prime is a type of prime number that's even more special than all the other primes out there. It's so special that it can only be found at specific places in a math problem called a series.
Don't worry if that sounds complicated, buddy. Just know that the Wolstenholme prime is like a secret treasure that can only be found in a very special place. And when people do find it, it's like they've solved a really hard puzzle.