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#include <iostream> #include <math.h> using namespace std; int main() { unsigned long int n, d; int prim=1; cout<<"n=? "; cin>>n; for(d=2; d<=sqrt(n); d++) if(n%d==0) prim=0; if(prim==1) cout<<n<<" e prim"<<endl; else cout<<n<<" NU e prim"<<endl; return 0; }

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