Find a 3x3 magic square that is composed of 9 prime numbers (not the numbers from 1-9) and show how you found it.

(A magic square, as you may already know, is one in which the respective sums of the numbers in all the rows, columns, and both major diagonals all add up to the same number.)
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Since "Magic Square" is a term used outside the scope of this problem, I'm sure you can find an answer on the internet. Please find a solution independently.

Smallest prime 3x3 magic square with '5'

[ 47 113 17]
[ 29  59 89]
[101   5 71]

Smallest magic square with '7'

[ 43 139  37]
[ 67  73  79]
[109   7 103]

Smallest magic square without any 1-9

[ 59 113 41]
[ 53  71 89]
[101  29 83]

A very interesting pair of magic squares:
Smallest twin prime magic squares

[107 281  59] | [109 283  61]
[101 149 197] | [103 151 199]
[239  17 191] | [241  19 193]

Posted by Brian Smith on 2004-03-11 17:14:14