Elliptic curve cryptography does not rely on the difficulty of prime factorization. That is likely why that comment you are replying to is downvoted; that comment doesn't answer the question that it is replying to.

For an intro to the math behind elliptic curve cryptography, here's a good read: https://hackernoon.com/what-is-the-math-behind-elliptic-curv...

Lazy trolling.