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August 29, 2015 13:58
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| var i = 1, | |
| curr = 2; | |
| function isPrime(x){ | |
| var j = 2, | |
| sq = Math.sqrt(x); | |
| while (j <= sq) { | |
| if (x%j == 0) return false; | |
| j++; | |
| } | |
| return true; | |
| } | |
| function nthPrime(n, d) { | |
| if (n == 0) return 1; | |
| if (n == 1) return 2; | |
| while (i<n) { | |
| if (curr >= 3) { | |
| curr = curr + 2; | |
| } else { | |
| curr++; | |
| } | |
| if (isPrime(curr)) { | |
| i++; | |
| } | |
| if ((new Date() - d) > 10000) { | |
| $('result').html(curr); | |
| return; | |
| } | |
| } | |
| return curr; | |
| } | |
| var d = new Date(), | |
| nth = 499999; | |
| console.log(nthPrime(nth)); | |
| console.log('time: ' + (new Date() - d)); |
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