Oh, it's such a perfect number. I want to count it with you.

All part of Robin Wilson's 18-part series on the equations that add up to mathematics.

PS: we would also like to apologise for a slip of the tongue at 1.17 when Robin says 2 to the n is prime when he obviously means 2 to the n-1. However, the graphic is correct. Admin has been sacked (by Admin).

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Posted on 31 Aug 2026, 3:46pm. Please contact us with feedback and comments about this page.