The book is now available! 220
(another Prime Pages' Curiosity)
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The nth Prime Page will now find any of the first 2.623˙1015 primes or π(x) for x up to 1017.

+ The largest difference between two consecutive primes less than 108. [Luhn]

+ The difference of two smallest pseudoprimes base 2 is 220, the smallest amicable number. [Gupta]

(There is one curio for this number that has not yet been approved by an editor.)

  To link to this page use /curios/page.php?number_id=641



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