Verify that $18^6 \equiv 1 \pmod{7^k}$ for each $k = 1, 2, 3$
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For k = 1: 186 mod 7h = 186 mod 7 = 2 For k = 2: 186 mod 7h = 186 mod 14 = 6 For k = 3: 186 mod 7h = 186 mod 21 = 6 Show more…
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