Can I somewhere see the number of registered users on our site [ without multiplying the number of pages by 36, the number of users per page] ?

  • $\begingroup$ I think there are $n$ registered users, and $k$ unregistered users. Both $n$ and $k$ are in $\Bbb N$, and are probably smaller than $10^{8000}$. $\endgroup$
    – Asaf Karagila Mod
    Commented Aug 28, 2013 at 9:20
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    $\begingroup$ An aside: to find how many total users there are (both registered and unregistered), use this page: stackexchange.com/sites#questions $\endgroup$
    – apnorton
    Commented Aug 28, 2013 at 13:27

1 Answer 1


A possible way to get an idea about this number is to look at the right (i.e. total reputation tab) of this page. As of today, it seems that there are $65\,508$ registered users.

On the other hand, I am sure that a lot of people create new account for every new question they have, and therefore the number of actual users is (much?) less than the number of registered accounts.

  • $\begingroup$ Dear O.L. : perfect answer + clever remark $\implies$ upvote+acceptance of answer+many thanks :-) $\endgroup$ Commented Aug 28, 2013 at 10:41
  • $\begingroup$ When I decrease the time period over which the reputation is totaled on that page, the number of users increases. When I set it to "Week", I see $72\,006$ users. This seems odd. The number of users at $100\,000+$ stays at $6$. $\endgroup$
    – robjohn Mod
    Commented Aug 28, 2013 at 12:39
  • $\begingroup$ @robjohn I have also noticed this. In the first version of my answer I gave a link to "week" and later corrected it by "all-time". In the range 100-5000 reputation this gives quite different numbers, and it is "all-time" which seems to correspond to what one obtains by multiplying the number of relevant pages by 36. $\endgroup$ Commented Aug 28, 2013 at 13:02
  • $\begingroup$ Dear O.L., the multiplication by 36 gives 57960, whereas the "all time" page of yor link gives 65524. Do you also get such a discrepancy? $\endgroup$ Commented Aug 28, 2013 at 13:57
  • $\begingroup$ Dear @GeorgesElencwajg , yes. But, for example, for users with +500 reputation, we obtain $60\times 36+26=2186$. This is rather close to currently indicated $2206$ ("all-time") and very far from $682$ ("week"). $\endgroup$ Commented Aug 28, 2013 at 14:24
  • $\begingroup$ Thanks again, O.L. $\endgroup$ Commented Aug 28, 2013 at 17:58
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    $\begingroup$ Oh hey, almost 2^16. $\endgroup$
    – Alexander Gruber Mod
    Commented Aug 28, 2013 at 18:50
  • $\begingroup$ @AlexanderGruber: You must have been studying 2-groups lately :) $\endgroup$
    – Prism
    Commented Aug 28, 2013 at 19:19

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