Toolkit 52Euler's TheoremLet nnn be a positive integer. If gcd(n,a)=1\gcd(n,a)=1gcd(n,a)=1,aφ(n)≡1(modn)a^{\varphi(n)}\equiv1\pmod naφ(n)≡1(modn)Related ProblemsCoreAMC 10B/12B 2024 (Problem 18/14)AMC 12B 2025 (Problem 9)