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Math Help - basic/ish euler phi question

  1. #1
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    basic/ish euler phi question

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    Last edited by yellow4321; March 6th 2008 at 06:13 AM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by yellow4321 View Post
    ok i know how to compute say Euler-phi of (18) i go through integers up to 18 and then gcd(18,n) =1 then i count them, what is the method to find say Euler-phi of say (222) or something where counting is not appropriate?thanks
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