Using Euler's theorem, find the least residue of the multiplicative inverse of  5^phi(121) - 4   modulo 121. (Note that (5, 121) = 1.)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.2: Exponential Functions
Problem 61E
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Using Euler's theorem, find the least residue of the multiplicative inverse of 

5^phi(121) - 4

 

modulo 121. (Note that (5, 121) = 1.)

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