Question

What is the multiplicative inverse of 168 in modulo 83 ?

Answer 1

Naive method. A naive method consists of trying all numbers from the set {0, ..., m - 1} . For every number x from this set, calculate a * x mod m , i.e., the remainder from the division of a * x by m . The modular multiplicative inverse of a modulo m is the value of x for which this remainder is equal to 1 .

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