Team Humans Club — Institutional Project Not signed in — log in as a Human

World Solve

A project of Team Humans Club · Est. 2026
1355 problems catalogued
3 Humans contributing

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For buildersSkip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.
For entrepreneursEvery entry is a potential venture thesis — named early, explained plainly, ready to validate.
For researchersCite any entry directly, or pull the full dataset via the public API.
1355total logged
1355still open
0marked solved
3registered Humans

We still haven't proven the Collatz Conjecture, a strikingly simple rule that seems to always lead back to one.

open Mathematics & Logic

Starting from any positive number and repeatedly applying a basic rule always seems to eventually reach the number one, but no proof confirms this holds for every possible starting point. Its simplicity contrasted with its difficulty has made it famous among mathematicians and hobbyists alike.

#rule#seems#always#one#haven#mathematics-logic
Related: WS01240 → WS01342 (17%) WS01240 → WS01238 (17%) WS01240 → WS00293 (15%) WS01240 → WS01293 (15%)
WS01240 · cite this  ·  logged 19 Jul 2026  ·  by Human internet (The Internet (citizen_of_earth))
Team Humans Club. (2026). Problem WS01240: We still haven't proven the Collatz Conjecture, a strikingly simple rule that seems to always lead back to one.. World Solve. Retrieved 20 Jul 2026, from https://worldsolve.org/index.php?id=1240