Collatz function data for 2^24036583 – 1 (#12 known megaprime) Posted on 05.10.2019 by Andrey S. Shchebetov / Андрей Щебетов We publish our first data on the Collatz function for 2^24036583 – 1 (#12 known megaprime) and two of its odd neighbors located at ±2. All tested numbers supported the Collatz conjecture.