Prefix count limit?

Hi everyone, I got an announcement from my iptransit provider stating the ipv4 routing table size has now exceeded 500k routes, so I thought lets check if bird is able to handle this and actually find out if there are any limitations. I could not find it on the website, but if I remember correctly the amount of routes is only impacted by the amount of memory the bird server has? Kind regards, Tom van Leeuwen