+Fermat's Little Theorem is a cornerstone of [Number Theory](/wiki/number_theory), revealing a profound relationship between [Prime Numbers](/wiki/prime_number) and powers. It states that for a prime *p* and any integer *a* not a multiple of *p*, *a*^(p-1) is congruent to 1 modulo *p*. This simple yet powerful insight forms the basis for various primality tests and cryptographic algorithms.
+## See also
+- [Modular Arithmetic](/wiki/modular_arithmetic)
+- [Euler's Theorem](/wiki/euler%27s_theorem)
+- [Cryptography](/wiki/cryptography)
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