29

This number is a prime.

Just showing those entries submitted by 'Capelle': (Click here to show all)

+ 72 + 82 + ... + 282 + 292 is a square. [Capelle]

+ 329 - 229 is prime. [Capelle]

+ The largest natural number n for which the sum of digits is not smaller than n/3. [Capelle]

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