Online Count on the main runescape website:

Players online, ingame (rs3):

Players:4504

Players:3907

Players:2185

Players:2826

Players:3590

Players: 3249

Players:3293

Players: 3956

Players: 686
And the fucking total is: 28196
So jagex where the fuck did 51896 come from?
Well,the current oldschool playercount is:

So, 16078
28196 + 16078 = 44274
SO, the playercount displayed on the rs website is totally faked, there's even 7622 players missing if you add up the playercount on rs3, oldschool.
The missing 7622 are users currently logged in on the rs3 site (From what i've heard, from other people)