Can you fill a 4x4 square so each row and each column forms a prime number? And a 5x5 square?

Note: in both cases, there should be no duplicate rows or duplicate columns. Also, numbers cannot start with a 0. Finally, all digits from 0 to 9 should be used at least once.

how about this contribution ? a 10 x 10 array !!

5322818971
6827241919
5993645263
5559929113
3977461949
2227498523
5388417583
3649692979
6589485989
9339391933

I found it, and it was produced by computer. There´s also a 33 x33 array !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Posted by pcbouhid on 2005-07-19 16:13:45