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Sunday Times Teaser 2655 – Sudoprime

by Peter G. Chamberlain


The cross-figure above has eleven answers, five across and six down, all of which are primes with two or three digits.

No digit appears more than once in any row, column or main diagonal.

What are the two largest primes?

One Comment
  1. brian gladman permalink

    This solution uses my prime class which is available here.

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