<section id="description">
<p>Define Co(n) to be the maximal possible sum of a set of mutually co-prime elements from {1, 2, ..., n}. For example Co(10) is 30 and hits that maximum on the subset {1, 5, 7, 8, 9}.</p><p>You are given that Co(30) = 193 and Co(100) = 1356.</p>
<p>Find Co(200000).</p>
</section>

function euler355() {
  // Good luck!
  return true;
}

euler355();


index

Problem 355: Maximal coprime subset

<code>euler355()</code> should return 1726545007.