[seqfan] Re: Magic squares of primes(?)

Emmanuel Vantieghem emmanuelvantieghem at gmail.com
Fri Aug 19 21:20:11 CEST 2016


You find a 'stronger' problem at
http://www.primepuzzles.net/puzzles/puzz_004.htm

2016-08-19 20:15 GMT+02:00 Zak Seidov <seqfan at list.seqfan.eu>:

>  Fill NxN square with decimal digits
> such that
> all rows/columns and 2 main diagonals read primes.
> Simple(st?) 3x3 case:
> 227
> 727
> 733
> with 227,727,733,277,223,773,223 and 727 all primes.
> Cases with all primes distinct?
> Larger (largest?) cases?
> Old hat?
> zak
>
>
>
>
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