http://xise.nl/mirc/wiki/doku.php?id=hashtablesMaximum N value is 10000 and it's impossible to change that value.
If a table was created with N=100 and after a while the number of slots is 10,000 then it'd be a good idea to increase N to, lets say, 1000.)
Theorically true, but then you can just save the current table and reload it into a new table, if that's impossible to do efficiency-wise for you, well use a dll.