@starsandrobots that is a really neat fact! I think I've got it: (p+1)(p-1), and obvi one of those is divis by 3, one by 4, and other by 2
@quince I just decided I was too embarrassed to have tweeted that :) should I reinstate?
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@starsandrobots it was a new brainteaser to me, and doing math is a great way to start the morning :)Thanks. Twitter will use this to make your timeline better. UndoUndo
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