On Mon, Jan 23, 2012 at 12:08 PM, Shreesh bhat <shreeshbha...@gmail.com>wrote:
> No,i meant sum of digits is prime and also sum of square of digits is > prime. > E.g: 23 is lucky cos > 2+3=>5 (prime) > 2**2+3**2 => 4+9 => 13 (prime) > Thanks for the clarification - or I should say "correction", since "sum of square of digits" and "square of sum of digits" are NOT equivalent!
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