It's not often I stumble upon prime numbers fans like that :-)
Yes I was and am still fascinated by the prime numbers. That's how I got into cryptgraphy. It's a bid sad that it is not the direct base of the most used algorithm (elliptic curves, lattice,...). Maybe, as you say, we will find new ways to use them but we have to be aware of the Quantum computer threat.
Welcome on Steemit too.