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Sudoprime (Posted on 2013-09-04) Difficulty: 3 of 5
In the crossnumber puzzle below, two cells have already been filled in with digits: a 7 and a 3. The empty squares represent one digit each and the black squares separate the numbers.
  • When filled in, the horizontal and vertical sequences of digits will represent eleven 2- or 3-digit prime numbers.
  • No digit appears more than once in any given row, column or either of the long diagonals.
  • No even digit appears more than once anywhere.

  7 ■ ■ ■ □
  □ □ ■ □ □
  ■ 3 □ □ ■
  □ □ ■ □ □
  □ ■ ■ ■ □

There are no leading zeros in any of the primes.


From Enigma No. 1755, "Sudoprime II", by Peter Chamberlain, New Scientist, 29 June 2013, page 30.

No Solution Yet Submitted by Charlie    
Rating: 4.0000 (1 votes)

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  Subject Author Date
SolutionNo Subjectsum2013-10-12 22:25:26
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