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D.12.1.5 euler

Procedure from library aksaka.lib (see aksaka_lib).

Usage:
euler(r);

Return:
bigint phi(r), where phi is Eulers phi-function

Note:
first r is factorized with proc PollardRho, then phi(r) is calculated with the help of phi(p) of every factor p;

Example:
 
LIB "aksaka.lib";
euler(99991);
==> 99990


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