Brainfuck is open again

I have known for quite a while that problems 1 and 6, which I solved with brainfuck and the very bf-like Ook! were not very hard to solve with pencil, paper and a calculator, putting them into the "solvable analytically" category. I finally admitted now and wrote up pencil and paper solutions that are linked to in the progress table...and this means that I am somewhat obligated to solve another problem in brainFuck.