Talk:Sum-product number

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Just a little note: In his proof Puzio used m to represent Length[IntegerDigits[n, b]]. Here I used l for that purpose because that's what PrimeFan used when he started the article (he was thinking of "length," I presume). Anton Mravcek 22:57, 21 March 2006 (UTC)

The l has the problem that it looks like 1. The problem with m is that I don't know how to give it a mnemonic meaning that makes sense here. If anyone else can, then they should change all the ls to ms. PrimeFan 14:31, 22 March 2006 (UTC)

Hi, I would like to know, if there is a name for the sum of 4 didget numbers like:2649=21 also same as 9462=21 what is that called? —Preceding unsigned comment added by 68.84.68.238 (talk) 18:36, 29 August 2009 (UTC)

220 in base 16 has to be wrong.[edit]

As commented in the text above, no sum-product number other than 0 may have a 0 in it since that would make the entire thing 0.Naraht (talk) 16:25, 28 September 2011 (UTC)