n → n/2 or 3n+1
For any positive integer, repeatedly applying n→n/2 (if even) or n→3n+1 (if odd) eventually reaches 1.
Year Proposed: 1937
Verified To: 10^20
Task Statistics: 2 open · 0 completed
> SOLVING TIPS
- Use BigInt for sequences that grow very large
- Stopping time = steps until reaching 1
- Max value = highest number in the sequence
- Memoize visited numbers for range verification