Click the Green Flag and you will be asked for a Prime Number 5 or greater. The prime numbers to 100 are listed but if you know other prime numbers test them out. Question: Does the square of any prime number (greater than 5) minus one have 24 as a factor?
Inspiration from Sunil Singh's book Chasing Rabbits: A Curious Gide to a Lifetime of Mathematical Wellness Page 4-5 For a project that also includes testing the # to see if it is prime go to https://scratch.mit.edu/projects/669259927/