[[matematik:start|Tilbage til Matematik]]

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===== Euler problemer =====

Se NumSeq moduler på cpan: [[http://search.cpan.org/~kryde/Math-NumSeq-61/]]

Nayjukis løsninger med forklaringer og java-source http://nayuki.eigenstate.org/page/project-euler-solutions

  * [[http://stackoverflow.com/questions/34260399/linear-time-eulers-totient-function-calculation|Hurtig Eulers totient funktion]]
  * [[http://stackoverflow.com/questions/1877255/problems-with-prime-numbers/1877335#1877335|Find prime factors]]
  * [[http://forums.xkcd.com/viewtopic.php?t=57306&p=2039068|Problem 258 - lagged fibonacci]]
  * [[http://codereview.stackexchange.com/questions/129754/project-euler-549-divisibility-of-factorials|E549 -Divisibility of factorials]]
  * [[https://en.wikipedia.org/wiki/Carmichael%27s_totient_function_conjecture|Carmichael's totient function conjecture]]