return arr.filter(function isPrimes(s){
if(s<2)return false; if(s==2)return true; for(var i=2;i<=Math.sqrt(s);i++){if(s%i==0){return false;}} return s; });
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你以为那是谁
if(s<2)return false; if(s==2)return true; for(var i=2;i<=Math.sqrt(s);i++){if(s%i==0){return false;}} return s; });