Hellenica World

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18

18 = 2 * 3 * 3

218 - 1 = 3 * 3 * 3 * 7 * 19 * 73

1018 - 1 = 3 * 3 * 3 * 3 * 7 * 11 * 13 * 19 * 37 * 52579 * 333667

17 - 18 - 19

0 - 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9

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