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Enigma Number 1740

By Peter Chamberlain

13 March 2013

Sudoprime

The grid on the right shows a cross-figure with two digits given as a start. The 11 answers are distinct primes and none has a leading zero. No digit appears more than once in any row, column or either of the two long diagonals. What are the numbers in the shaded regions?

WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 10 April. The Editor’s decision is final. Please send entries to Enigma 1740, Âé¶¹´«Ã½, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1734 Friendly factors: PRINTED is 9478162

The winner Jason Dickson of Bretforton, Worcestershire, UK

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