So, since both RM and FT Animes are paused and most probably will never go on, let's talk how far they came.
Manga: ~300 Chapters
Anime: 51 Episodes (first 95 chapters)
Longest arc: Blue Guardians/Makai arc
Manga: ~535-700 Chapters
Anime: 277 Episodes (first 419 chapters)
Longest arc: Alvarez Empire arc