Modifiers are also supported, seperated by a comma:
<n - List channels with less than n users
>n - List channels with more than n users
+ C<n - List channels created in the last n minutes
+ C>n - List channels older than n minutes
+ T<n - List channels whose topics have changed in the
+ last n minutes
+ T>n - List channels whose topics were last changed
+ more than n minutes ago
eg LIST <100,>20