The kata is more targeted towards a paging as in memory paging mechanism, not to be mixed up with a page in a book. Here is a pointer: https://en.wikipedia.org/wiki/Paging. In computer science nearly every counting sequence starts at 0 (think of array indices for example).
Concerning the test output, I agree.

Maybe numbers are too big for JS and I would have to change them...

Javascript.
And what I've found is that my sum, for large numbers, starts to be different from the correct value (I've checked it with wolfram alpha and also with a quick implementation in python).

Which language?

I've optimized my solution (expanded the summation) but I'm still stuck with the expected value of 55100.
Is there any clever trick that needs to be applied when we reach those huge values for m?
Thanks in advance!

I improved the solution in other languages:-) Thank for the feedback!

I don't understand what you mean. Please can you be more explicit?