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Prime Test
By MRITuhin, history, 7 years ago, In English

We know that if n is prime, then:

{a^(n-1)} mod n = 1 [Fermat primality test]

Can anyone explain its mathematical proof?

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7 years ago, # |
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https://en.wikipedia.org/wiki/Proofs_of_Fermat%27s_little_theorem

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