Project Euler in Clojure – Problem 16

Here is my solution to Problem 16 of Project Euler. As always, my progress you can tracked on GitHub at

Problem 16 of Project Euler is:

What is the sum of the digits of the number 2^1000

This problem was straight forward since I already had the function digits-of defined from problem8. I was able to be very declarative in my problem, so much so, that it reads as the problem statement you are asked to solve.

(defn problem16
  ([] (problem16 1000))
  ([n] (sum (digits-of (expt 2 n)))))

As always, any feedback you have for me is greatly appreciated.


One thought on “Project Euler in Clojure – Problem 16

  1. Pingback: Clojure function has-factors-in? « Proctor It

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