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Apr 20th, 2014
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  1. prime <- function(k){
  2. pn <- vector("numeric", length=k)
  3. pn[1] <- 2
  4. l <- 2
  5. i <- 3
  6. n <- 0
  7. while(l<=k){
  8. sig <- 0
  9. for(j in seq(1, sqrt(i), 2)){
  10. n <- n+1
  11. if (i%%j==0){
  12. sig <- sig+1
  13. if (sig>1) break
  14. }
  15. }
  16. if (sig==1){
  17. pn[l] <- i
  18. l <- l+1
  19. }
  20. i <- i+2
  21. }
  22. return(n)
  23. }
  24. prime(10000)
  25. ## [1] 1486471
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