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(just those submitted by Poo Sung)
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Just showing those entries submitted by 'Poo Sung': (Click here to show all)

+ 61 = 115 in base 1 + 1 + 5. [Poo Sung]

+ The smallest prime which can be represented as a sum of emirps (61 = 13 + 17 + 31). [Poo Sung]




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