Lesson plan

Kempner function

In number theory, the Kempner function S(n) is defined for a given positive integer n to be the smallest number s such that n divides the For example, the number 8 does not divide 1! , 2! , but does This function has a highly irregular growth rate: it grows linearly on the prime numbers but only grows sublogarithmically at the factorial numbers.

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Article summary

In number theory, the Kempner function S(n) is defined for a given positive integer n to be the smallest number s such that n divides the For example, the number 8 does not divide 1! , 2! , but does This function has a highly irregular growth rate: it grows linearly on the prime numbers but only grows sublogarithmically at the factorial numbers.

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  1. Summarise the article in your own words. Which single claim would you verify first, and why?
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  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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