# How many registered users are there?

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] ?

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

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.

• Dear O.L. : perfect answer + clever remark $\implies$ upvote+acceptance of answer+many thanks :-) Aug 28, 2013 at 10:41
• 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 $6$.
– robjohn Mod
Aug 28, 2013 at 12:39
• @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. Aug 28, 2013 at 13:02
• 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? Aug 28, 2013 at 13:57
• 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"). Aug 28, 2013 at 14:24
• Thanks again, O.L. Aug 28, 2013 at 17:58
• Oh hey, almost 2^16.
– Alexander Gruber Mod
Aug 28, 2013 at 18:50
• @AlexanderGruber: You must have been studying 2-groups lately :) Aug 28, 2013 at 19:19