1901
This number is a prime.
Just showing those entries submitted by 'Poo Sung': (Click here to show all)
1901 = 1&13 + 2&12 + 3&11 + 4&10 + 5&9 + 6&8 + 7&7 + 8&6 + 9&5 + 10&4 +
11&3 + 12&2 + 13&1, where & denotes concatenation. [Poo Sung]
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