a,c;main(i,b){for(i=2;i<19992;i++){b=1;for(a=2;a<i;a++)if(i%a==0)b=0;for(a=0,c=i;c;a=a*10+c%10,c/=10);if(i==a&&b)printf("%d\n",i);}}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
download
return to the top page