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May 27th, 2018
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  1. let sumPrimes = function(n) {
  2. return Array
  3. .from(Array(n).keys())
  4. .slice(1)
  5. .filter(n => {
  6. for(let i = 2; i < n; i++) if(n % i == 0) return false;
  7. return true;
  8. })
  9. .reduce((acc, n) => acc + n);
  10. };
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