Tata Institute of Fundamental Research | Emotional Arithmetic | Liouville's theorem | Charter of Fundamental Rights of the European Union | Arithmetic | Arithmetic mean | Chinese remainder theorem | Modular arithmetic | Shannon–Hartley theorem | Quillen–Suslin theorem | Nyquist–Shannon sampling theorem | Hahn–Banach theorem | Fermat's Last Theorem | Buckingham π theorem | Thue–Siegel–Roth theorem | Szemerédi's theorem | Schottky's theorem | Robinson arithmetic | Riemann-Roch theorem | Reading, Writing, and Arithmetic | Pythagorean theorem | Nash embedding theorem | Müntz–Szász theorem | Malgrange–Ehrenpreis theorem | Kleene fixed-point theorem | Kakutani fixed-point theorem | Gauss–Bonnet theorem | Fundamental analysis | Fixed-point arithmetic | Doob's martingale convergence theorem |
Using the fundamental theorem of arithmetic is a straightforward way, but there are also more economic approaches, e.g. using pairing function combined with Chinese remainder theorem in a sophisticated way.