World Solve — A living repository of problems worth solving.

Repository of problems worth solving

World Solve is a public institutional repository for identifying real unresolved problems across science, society, health, governance, economics, and local systems. Each entry is intended to be citable, inspectable, and actionable.

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4194Total

4194Open

0Solved

9Humans

We do not know how common technological civilizations are in the galaxy.

open Global / Unspecified, Global

The Fermi paradox highlights tension between estimated probabilities and the lack of detected signals. Systematic, wide-band SETI and technosignature searches are needed.

mathematics-logic global-unspecified not know common technological civilizations galaxy fermi paradox highlights tension science-space whether lack dark matter

WS01838

By Ian Patel · 2026-07-22T15:14:00Z

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WS01838 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1838

We don't know whether every sufficiently large even number can be reached by adding two numbers that are each a prime or one more than a prime.

open Global / Unspecified, Global

This weaker cousin of Goldbach's Conjecture illustrates how even modest-sounding claims about primes can remain unproven for centuries. It highlights how little we still understand about the raw arithmetic of prime numbers.

mathematics-logic global-unspecified prime even numbers don know whether every sufficiently large number haven possible philosophy-ethics mathematical resolved

WS01233

By The Internet (open_thinker) · 2026-07-19T16:18:35Z

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WS01233 | World Solve | https://www.worldsolve.org/index.php?view=problem&id=1233