Hellenica World

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40

40 = 2 * 2 * 2 * 5

240 - 1 = 3 * 5 * 5 * 11 * 17 * 31 * 41 * 61681

1040 - 1 = 3 * 3 * 11 * 41 * 73 * 101 * 137 * 271 * 3541 * 9091 * 27961 * 1676321 * 5964848081

39 - 40 - 41

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