Talk:Strange plus numbers: Difference between revisions
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: It seems that strange numbers and strange plus numbers have been coined by CalmoSoft. The web seems to know nothing of them. 498 is a 'strange plus number' because 4+9 is prime and 9+8 is prime. Every sum of adjacent pairs of digits must be prime. --[[User:Chunes|Chunes]] ([[User talk:Chunes|talk]]) 08:13, 23 February 2021 (UTC)
:: This would seem to exclude all 1-digit numbers from being 'strange plus numbers,' but I'm no expert. --[[User:Chunes|Chunes]] ([[User talk:Chunes|talk]]) 08:16, 23 February 2021 (UTC)
::: There's something [https://nrich.maths.org/722 here] but the definition is not the same as CalmoSoft's. Curiously, he always misses off the first column of output in his Ring solutions.
::: Hope there's not going to be too many of these - don't want another ''unixdict.txt'' situation! --[[User:PureFox|PureFox]] ([[User talk:PureFox|talk]]) 10:17, 23 February 2021 (UTC)
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