<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>高效判断质数</title>
</head>
<body>
    <script>
        function isPrime(num){
            var temp=parseInt(Math.sqrt(num))
            for(var i=2;i<=temp;i++){
                if(num%i==0){
                    return false
                }
            }
            return true
        }
    </script>
</body>
</html>