It happens :) I spent 1.5 days on level 23. And now stuck on level 35 for 2 days. Sometimes things are really very simple, but we complicate them. Sometimes we make mistake while typing the answer, like I did on level 26. That extra space in my answer took my whole day.

yeah, the problem is that english isn't my first language and idk what each terms mean,

update : still trying to make a link between the clue and prime

holy shit, that was so obvious, hard and complicated at the same time, thanks for your help on that, you really help me