Math dealing with real/complex numbers has been vastly explored, and there are very powerful tools, and computers are very good at these kind of problems (Calculus, etc)
With number theory, progress is much harder, things work in a completely different logic (think for example that 5+3 can be 0 for example)
One of the places where these mysterious sides of math comes together is this: http://en.wikipedia.org/wiki/Riemann_zeta_function
I wasn't aware that the modulo operation had been raised to a field of mathematics.
And ok, addition is nice and fun. Then you go to multiplication
Then you end up with Galois Fields.
Never underestimate the amount of discussion that goes into things like 1+1=2
When is that example true? It seems like you made that up.
But you don't need to write "mod 8" in a congruence class
Oh, you want "the mystery of number theory" you can start with http://en.wikipedia.org/wiki/Fermat%27s_little_theorem
(5 + 3) % 8 = 0 is not the same as 5 + 3 = 0
I'm not looking for mystery, I'm wondering why people think it exists, and are faking its existence by being imprecise.
I find a close correlation between people who play with numbers to people who like to solve puzzles.
I see what you did there.