Have you ever found a cool stick or a shiny rock?
I have and where I live is full of them!
Primes are like cool sticks and shiny rocks without having to keep them in your home.
They will live in the ether Forever... Don't believe me? Look at who Eratosthenes was...
(https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes)
The gaps between what they discovered and what they have allowed me to accomplish is quite a bit!