233

This number is a prime.

The smallest magic constant of a 5-by-5 prime magic square:

                        41  11   79   19   83


                        31  67   29   89   17


                        61  59   05   71   37


                        97  53   13   47   23


                        03  43   107  07   73

Note that this solution includes all the twenty-four odd primes below hundred (Andrew Lelechenko, 2009). [Beedassy]