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Oct 19th, 2019
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  1. function isPrime(num) {
  2. if(num === 2 || num === 3){
  3. return true;
  4. }
  5.  
  6. for(let i =2; i<=Math.floor(Math.sqrt(num)); i++){
  7. if(num % i === 0){
  8. return false;
  9. }
  10. }
  11. return true;
  12. }
  13.  
  14. function primeSummation(n) {
  15. let sum = 0;
  16. let i;
  17. for(i=2; i<n; i++){
  18. let bool = isPrime(i);
  19. if(bool){
  20. sum += i;
  21. }
  22. }
  23. return sum;
  24. }
  25.  
  26. primeSummation(2000000);
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