Talk:Untouchable numbers

1464

Unfortunately, the factors of 14641 are {1,11,121,1331} which sum to 1464.
According to https://oeis.org/A005114/b005114.txt
There are 1212 not 1,216 untouchable numbers <= 10,000
There are 13,863 not 13,886 untouchable numbers <= 100,000 --Pete Lomax (talk) 08:50, 9 February 2021 (UTC)

Yes, I see that I need to extend the search for each range of untouchable numbers.   A fix (hopefully) will be forthcoming.   Thanks for finding those errors in the REXX's output.     -- Gerard Schildberger (talk) 09:00, 9 February 2021 (UTC)

That certainly slowed up the search when I extended the search field.     -- Gerard Schildberger (talk) 09:14, 9 February 2021 (UTC)

To match up to 1e5 I increased the limit to 18*n, a tactic I would deem rather unsound. Note added to the Phix entry. --Pete Lomax (talk) 09:17, 9 February 2021 (UTC)

reduction in the number of (counting) ranges

I've reduced the number of ranges for counting untouchable numbers.     It seems the upper limit was far higher than I estimated.     -- Gerard Schildberger (talk) 09:28, 9 February 2021 (UTC)