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Prove that p2 – 1 is divisible by 24 if p is a prime number greater than 3
- ColinWright 15y agoThat should, of course, be p^2-1, and it's really easy using any of several techniques. I use this as an opening in some of the math masterclasses I do. I'm disappointed to see that the solutions on the referenced page use either heavy math theorems or near brute force. Elegance wins every time.