2. Consider the Carmichael number 561. (a) Compute the set W(561). Is |W(561)| < (561 - 1)/2?...

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2. Consider the Carmichael number 561.

(a) Compute the set W(561). Is |W(561)| < (561 - 1)/2?

(b) How many nontrivial square roots of 1 modulo 561 are there?

(2.33)

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