This semester I decided to take elementary number theory instead of intro to philosophy. While I so far am enjoying the class, I'm a physics major, and am looking to pursue research in gravity later down the road (only a freshman, so that's far away). The description for the course: This course introduces the basic concepts of number theory including the Euclidean algorithm, congruences, number-theoretic functions, and the Chinese remainder theorem. My question is: Would any of these topics come up at in gravity, or any other field in physics? Thanks for your time.