Don De Tina
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 Mar21 awarded Famous Question Apr25 awarded Notable Question Mar27 awarded Good Question Nov6 awarded Yearling Apr17 accepted For any prime $p > 3$, why is $p^2-1$ always divisible by 24? Feb23 awarded Popular Question Jan8 awarded Nice Question Jul28 comment For any prime $p > 3$, why is $p^2-1$ always divisible by 24? Thank you all for your responses. What I've received in insight has far exceeded my expectations. Jul28 awarded Scholar Jul28 comment For any prime $p > 3$, why is $p^2-1$ always divisible by 24? Thanks. Your brain works the same way mine does. Jul28 comment For any prime $p > 3$, why is $p^2-1$ always divisible by 24? I hadn't seen this approach previously. Thanks. Jul28 comment For any prime $p > 3$, why is $p^2-1$ always divisible by 24? Thank you Qiaochu. I've pursued your suggestions. Very motivating. Jul28 awarded Student Jul27 asked For any prime $p > 3$, why is $p^2-1$ always divisible by 24? Jul26 awarded Teacher Jul26 answered What does it mean to be going 40 mph (or 64 kph, etc.) at a given moment? Jul25 awarded Critic Jul21 awarded Supporter Jul20 awarded Autobiographer