A Prime Puzzle
Change 3659 to 8101 by changing one digit at a time. Sounds easy. There is a catch! All numbers have to be four-digit primes. There is a unique shortest solution in 6 changes. If you like it I can publish more.
Please confirm you want to block this member.
You will no longer be able to:
Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.