C :

#include<stdio.h>
#include<math.h>
int prime(int a)
{
	int sum=0;
	for(int i=2;i<a;i++){
		if(a%i==0)sum++;
	}
	return sum;
}
int p(int n)
{
		int a,b,c;
		a=n%10;
		b=n%100/10;
		c=n/100;
		if(prime(b+c)!=0&&b>a+c&&a!=b&&a!=c&&b!=c)
			return 1;
		else return 0;	
}
int main()
{
	for(int i=100;i<1000;i++)
	if(p(i))
	printf("%d\n",i);
	return 0;
}

C++ :

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main(){
	int x,i,g,s,b,j;
	bool f=false;
	for(i=100;i<=999;i++){
		g=i%10;
		s=i/10%10;
		b=i/100;
		if(g!=s&&s!=b&&b!=g&&s>g+b){
			x=s+b;
			for(j=2;j<=sqrt(x);j++){
				if(x%j==0){
					f=true;
					cout<<i<<endl;
					break;
				}
			}
		}
		
		
	}
}

Python :

def zs(n):
    if n==1:
        return 0
    elif n==2:
        return 1
    else:
        for i in range(2,int(n**0.5)+1):
            if n%i==0:
                return 0
        return 1

for i in range(100,1000):
    g=i%10
    s=i//10%10
    b=i//100
    if g!=s and s!=b and g!=b and s>(b+g) and zs(s+b)==0:
        print(i)