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  • $\begingroup$ That is not a general pattern though. Excluding reveal spoilernumbers already containing a 1, you also have reveal spoilerall other digits, then 22… and I guess that must be it? reveal spoilerAny other number not containing a 1 or 0 must have its digit product greater than its digit sum, and can thus be extended as described. $\endgroup$ Commented 8 hours ago
  • $\begingroup$ @DidierL How do you make a spoiler formatting in comments? I could not find it in editing help... $\endgroup$ Commented 1 hour ago
  • $\begingroup$ Found it! It's at the end of reveal spoiler puzzling.stackexchange.com/editing-help :) $\endgroup$ Commented 1 hour ago