27 Feb 8 divisions in 3 weeks
I managed to cut my worm of the regeneration-challenge in 3 pieces during the first amputation round. One week later, I could cut each piece in two. A week after that, I even managed to cut some of them again. In total, I obtained 8 living worms/pieces out of 1 worm. Four of them are just small tails at the moment of counting.