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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.

<font size=+2> <center>

  7 ■ ■ ■ □
  □ □ ■ □ □
  ■ 3 □ □ ■
  □ □ ■ □ □
  □ ■ ■ ■ □
<center> <font>

There are no leading zeros in any of the primes. <hr> 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)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution No Subject Comment 1 of 1
<table border="0" cellpadding="0" cellspacing="0" width="70" style="border-collapse:
 collapse;width:55pt">
 <colgroup><col width="14" span="5" style="mso-width-source:userset;mso-width-alt:512;
 width:11pt">
 </colgroup><tbody><tr height="20" style="height:15.0pt">
  <td height="20" class="xl65" width="14" style="height:15.0pt;width:11pt">7</td>
  <td class="xl65" width="14" style="width:11pt">x</td>
  <td class="xl65" width="14" style="width:11pt">x</td>
  <td class="xl65" width="14" style="width:11pt">x</td>
  <td class="xl65" width="14" style="width:11pt">3</td>
 </tr>
 <tr height="20" style="height:15.0pt">
  <td height="20" class="xl65" style="height:15.0pt">3</td>
  <td class="xl65">1</td>
  <td class="xl65">x</td>
  <td class="xl65">6</td>
  <td class="xl65">7</td>
 </tr>
 <tr height="20" style="height:15.0pt">
  <td height="20" class="xl65" style="height:15.0pt">x</td>
  <td class="xl65">3</td>
  <td class="xl65">0</td>
  <td class="xl65">7</td>
  <td class="xl65">x</td>
 </tr>
 <tr height="20" style="height:15.0pt">
  <td height="20" class="xl65" style="height:15.0pt">4</td>
  <td class="xl65">7</td>
  <td class="xl65">x</td>
  <td class="xl65">3</td>
  <td class="xl65">1</td>
 </tr>
 <tr height="20" style="height:15.0pt">
  <td height="20" class="xl65" style="height:15.0pt">1</td>
  <td class="xl65">x</td>
  <td class="xl65">x</td>
  <td class="xl65">x</td>
  <td class="xl65">9</td>
 </tr></tbody></table>

  Posted by sum on 2013-10-12 22:25:26
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