“Curious and Interesting Numbers was also fantastic. It starts with -1 and i, patiently takes us through 117 pages before breaking the number 100, and then accelerates into some really interesting numbers. We end with 1^billion (a “gigaplex”), F23471 (the largest known composite Fermat number), 10^10^10^34 (Skews’ number – that was a new one to me) and then Graham’s number (the world champion largest number.) After reading it, 3, 9, 27, and 42 are still my favorite numbers.”

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