Joshua_Blaine comments on New Monthly Thread: Bragging - Less Wrong

30 Post author: Joshua_Blaine 11 August 2013 05:50PM

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Comment author: Joshua_Blaine 12 August 2013 02:46:44AM 4 points [-]

I.. just.. WHAT? The last digits are the easiest, of course, BUT STILL. What was your methodology? (because I can't be bothered to think of how to do it myself)

Comment author: answer 12 August 2013 02:59:09AM 4 points [-]

I started with some iterated powers of 3 and tried to find patterns. For instance, 3 to an odd (natural number) power is always 3 mod 4, and 3 to the power of (a natural number that's 3 mod 4) always has a 7 in the one's place.