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19701Additive prime fun with 2,3 and 5.

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  • Mark Underwood
    Nov 12, 2008
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      The five numbers 3, 2*3^2, 2^2*3*5, 2^2*3^3 and 2^3*5^2
      (3,18,60,108 and 200)
      have all 16 of their additive combinations prime:
      11 17 47 53 131 137 167 173 227
      233 263 269 347 353 383 389.

      Mark
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