I’ve got this 6 weeks app thing (takes much much longer for me!
) which i have never completed.
I usually get up to week 6 day 1 when it just becomes impossible and i get stuck and then i stop doing them and then i pick it up again about 6 months later.
I started on 4,6,2,0,0 (couldn’t do the last 2 sets!!!) (think i was probably supposed to do more than 2 on the 3rd set as well) (12 total) in Jan and am up to 7,9,7,6,9 (38 total) now 
not sure i have ever got beyond 40!