The book is now available! 5
(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.

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5 requires 5 steps to reach 1 in the 3x + 1 (or Collatz) Problem. Paul Erdős said about the Collatz problem: "Mathematics is not yet ready for such confusing, troubling, and hard problems." He offered $500 for its solution. (Lagarias, 1985)


  Submitted: 1999-09-02 18:40:00;   Last Modified: 2012-04-02 14:24:59.

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