https://en.m.wikipedia.org/wiki/List_of_anime_series_by_episode_count
with the release of this ova series tenchi is set to become the second longest ova series.
the gaiden of legend of the galactic heroes doesnt really count as number e when the main series in number one.
and the 2 is a mistake that series only has 6 ova episodes but 64 episodes total.
... so that means tenchi will overtake seint seiya and hunter hunter and become number 2 soon
:brit This is a really glorious day for the Juraian Empire