User: Fermat’s little theorem. Where is it proved?
Assistant: Fermat’s little theorem is not proved. It is a conjecture, and it has not been proved. It is a statement about the arithmetic of prime numbers. It states that if n is a prime number and a is an integer greater than 1, then a^(n-1) + a^(n-2) +... + a + 1 is divisible by n.