Convergence verification of the Collatz problem

The convergence of all numbers below 705 × 2⁶⁰ (≈ 2^69.46) has been verified. The work unit is 2⁴⁰ numbers. On modern GPUs, verification of one work unit takes 12 seconds on average. All source codes are available on this GitHub repository.

Progress towards verifying all numbers below 706 × 2⁶⁰

Lowest incomplete: 92.5282 % (work unit 740216308 × 240, all work units below are verified)
Lowest unassigned: 92.7897 % (work unit 740219051 × 240, all work units below are assigned or even verified)