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Palindrome factors (Posted on 2022-03-15) Difficulty: 3 of 5
Six of the factors of 1221 are palindromes: {1,3,11,33,111,1221} but two are not: {37,407}

(A) What number under one million has the most palindrome factors?

Some numbers have only palindromes as factors. Examples include 88: {1,2,4,8,11,22,44,88} and any palindromic prime

(B) Find the smallest number with at least as many palindrome factors as part (A) but having only palindrome factors.

No Solution Yet Submitted by Jer    
Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Puzzle AnswerK Sengupta2022-07-11 23:38:49
re(3): My thoughts on the difficulty of part (B)Larry2022-03-16 15:46:50
re(2): My thoughts on the difficulty of part (B)Jer2022-03-16 08:56:21
re: My thoughts on the difficulty of part (B)Charlie2022-03-15 21:20:42
Some ThoughtsMy thoughts on the difficulty of part (B)Jer2022-03-15 10:50:18
Some ThoughtsNotes on algorithmLarry2022-03-15 09:45:03
Some Thoughtspart (A) solution and an attempt at (B)Charlie2022-03-15 09:22:53
SolutionSolutionLarry2022-03-15 07:26:00
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