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Project Euler 11 Mystery Cache

Hidden : 10/16/2014
Difficulty:
3 out of 5
Terrain:
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:

Acknowledgements


This cache was inspired by Project Euler.

General notes


  • To solve Project Euler puzzles, you will probably have to write a computer program.
  • Many of the containers are small, and contain neither pen nor pencil.
  • There are explicit finding notes in each geochecker.

The Puzzle


Consider the grid below:

   8 126   5  22  63  17  19  34  52  64  15  25  18 112  98  23  16  55  20 102
   4   8  57  19  48  12  29  46  10  16  35  65  48  22  14 135  30  27   2  91
 121  24 151   5   9   7  71   9  64  44  38  30  11  21  32  27  27  83  18  16
  64  19  40  59   6  20  21  17  83   9  16  75  54  51  25  24  15   7  28  22
   2  28  12  31  15  58  72  21   2  45  28  27  23  32  38   5  24  10  76  15
 156  20  36  46  37  39  45  47  13  39  13  26  21  20   7  37  17   6  13 113
  68  19  30  13  49   7  29  47  30  39  49  11  11  48  39  42  19  24 131  55
  32  30  48  24  49  38  22  67  12  18  36  24  48   8   6  20  40   8   6  44
  11  91  56   3  30  23  11  33  38  39  13  60  24  61   6  76  12  44  18   8
  56  20  22   8  35  20 138  32  18  56  32  27  13  48  20  24  89  17  37  71
  58  49  27  22  13  19  42  28  36  26  35  27 123  10  12  83  14  35  24  78
  32  16  16 171  35  21  11  28  34  32  40  22  80  70  12  13  17  47  15   7
  27  99  39  11  25  43   9  35  49  37  24  54   7  30  13 105   4  46  21  76
  82  29  17  41   2  23  23  22  24  20  60  36  38  48  66  16  74  16  12  35
   3  82   8  20  49 182  28  16  24  12  37   6  44  19  28   2  26   6 143  21
  50  11  35  54  10  23   6  21  10  61  46  75  10  36  52 127  19  34  41  63
  13  23  48  21   9   9  12  13  26  62  17  25   6  72  25  15  19  27   3   6
 140   1  27 103  18   9 173   3  57  18  17  33  29  22  76   5  23  51  42  45
  27  55  31  39  34  84  29  16  44   5  54  16  40  79  52   4  43 101   8  40
   5 142  97  59   6  23  10 126  71   6  38  65  29  26  28  37  35  18  56  47

Further, consider the possible products of four adjacent numbers in a straight line (horizontal, vertical, or diagonal).

To find this cache, calculate the greatest and least of these products.

I'd like to thank gilliwig for his help in debugging this cache, and congratulate him on solving it in its original, buggy, state.

I'd also like to thank Kambfhase for suggesting better wording for the puzzle.

Additional Hints (Decrypt)

Frr gur trbpurpxre.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)