Limit for mdN devices

[Sven Kirmess]

Is there a limit how many md devices I can create? My /dev contains
md0 to md15. I'd like to leave some gaps between each device to be
able to insert another later (to steer the resync order).

E.g.:

/dev/md3       /boot
/dev/md6       /
.
.
.
/dev/90        /home

Is that possible? I created md255 (with mknod) and made a metadevice.
It worked, but will there be future problems?

 Sven