Perfect Numbers and Mersenne Primes

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

We are re-visiting Perfect Numbers and Mersenne Primes, this time with Matt Parker.

Part Two of this interview at: http://youtu.be/q8n15q1v4Xo

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