The trick was to find nine consecutive primes. This won $100 from Martin Grdner by Harry Nelson. R. On Sun, 25 Aug 2002, David Wilson wrote: > I assume this is old news, but I found a 3x3 magic square with > all prime entries and minimal row sum = 177: > > 17 89 71 > 113 59 5 > 47 29 101 > > > >