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A short list (Posted on 2018-12-11) Difficulty: 2 of 5
List all the positive integers which are equal to the sum of the digits of their respective cubes.

How many of them are prime?

  Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)
Solution: (Hide)
1,8,17,18, ...
a.k.a. Dudeney numbers; A046459 in OEIS.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: Amazing postChrisMason2025-04-20 23:27:26
Amazing postPercy Rempel2025-03-16 21:01:04
re: No SubjectPercy Rempel2025-03-16 21:00:16
re: No SubjectPercy Rempel2025-03-16 21:00:02
No SubjectSarra Losen2019-01-07 04:54:02
Solutioncomputer solutionCharlie2018-12-11 11:08:27
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