Convergence verification of the Collatz problem
The convergence of all numbers below 1403 × 260 (≈ 270.45) has been verified. The work unit is 240 numbers. On modern GPUs, verification of one work unit takes 10 seconds on average. All source codes are available on this GitHub repository.
Progress towards verifying all numbers below 1404 × 260
Lowest incomplete: 16.0345 % (work unit 1471320262 × 240, all work units below are verified)
Lowest unassigned: 24.1326 % (work unit 1471405177 × 240, all work units below are assigned or even verified)