Thread: Square of Primes View Single Post
 2008-05-19, 14:57 #9 lavalamp     Oct 2007 Manchester, UK 2×3×223 Posts It would appear that there are an awful lot of these out there, so perhaps the challange should be to find a square with the lowest standard deviation of column/row/diagonal totals. I'll start the ball rolling with a slightly modified version of the last square I posted, with an s.d. of 84.51: Code:  239 / / / 3, 5, 7, 11, 17 --- 43 13, 19, 29, 23, 43 --- 127 31, 67, 61, 47, 71 --- 277 53, 59, 89, 73, 37 --- 311 79, 83, 41, 97, 101 --- 401 | | | | | \ | | | | | \ | | | | | \ 179 233 227 251 269 257 Last fiddled with by lavalamp on 2008-05-19 at 15:06