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
open
Global / Unspecified, Global
This conjecture about the zeros of a specific complex function would, if proven, tighten our understanding of how primes are distributed among all integers. It's considered one of the most important unsolved problems in mathematics.
mathematics-logic
global-unspecified
proven
haven
riemann
hypothesis
predicts
exactly
building
blocks
prime
numbers
whether
know
every
possible
mathematical
resolved
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
open
Global / Unspecified, Global
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.
mathematics-logic
global-unspecified
rule
seems
always
haven
proven
collatz
conjecture
strikingly
simple
lead
whether
know
possible
every
mathematical
resolved
open
Global / Unspecified, Global
This question, closely related to the once-open Poincaré Conjecture, has been resolved in three dimensions but opens further mysteries in higher-dimensional analogues. Exploring these generalizations remains an active area of topology.
mathematics-logic
global-unspecified
don
know
whether
every
simply
connected
three-dimensional
shape
holes
always
haven
resolved
philosophy-ethics
possible
open
Global / Unspecified, Global
Some conjectures suggest that most true statements in sufficiently complex systems may have no short proof at all, only extremely long or even infinite ones. This unresolved question challenges our basic assumptions about what makes mathematics knowable.
mathematics-logic
global-unspecified
all
long
haven
proven
whether
almost
mathematical
truths
require
infinitely
philosophy-ethics
resolved
know
possible
every
open
Global / Unspecified, Global
Related conjectures about how primes combine remain only partially proven for specific ranges, without a fully general confirmed pattern. This connects to broader unresolved questions about the additive structure of prime numbers.
mathematics-logic
global-unspecified
prime
proven
numbers
haven
whether
every
sufficiently
large
number
written
know
possible
philosophy-ethics
resolved
mathematical
open
Global / Unspecified, Global
This long-standing conjecture claims there's always at least one prime number between any two consecutive perfect squares, and while verified extensively by computer, no general proof exists. Solving it would sharpen our understanding of prime distribution.
mathematics-logic
global-unspecified
there
conjecture
always
between
consecutive
perfect
squares
don
know
whether
haven
possible
every
philosophy-ethics
resolved
mathematical
open
Global / Unspecified, Global
Various conjectures link the number of prime factors a number has to specific patterns of behavior, but many of these connections remain only partially proven. This continues to be explored within analytic number theory.
mathematics-logic
global-unspecified
number
prime
factors
has
don
know
whether
exact
minimum
distinct
haven
possible
every
resolved
philosophy-ethics
mathematical
open
Global / Unspecified, Global
History has shown some conjectures hold for enormous ranges before finally failing, raising the unresolved question of how confidently mathematicians can ever trust patterns observed only in finite testing. This shapes ongoing debates about the reliability of computational evidence in mathematics.
mathematics-logic
global-unspecified
haven
proven
whether
every
mathematical
theorem
holds
true
small
cases
know
resolved
philosophy-ethics
possible
open
Global / Unspecified, Global
Some conjectures hold true for infinitely many tested cases without yet having a general proof, raising open questions about whether extensive verification alone can ever substitute for full mathematical certainty. This unresolved tension shapes ongoing debates about the nature of mathematical proof.
mathematics-logic
global-unspecified
mathematical
whether
true
infinitely
cases
general
haven
resolved
every
statement
philosophy-ethics
know
possible
open
Global / Unspecified, Global
Known as Goldbach's Conjecture, this simple-sounding statement has been checked for enormous numbers without exception, but never formally proven true for all numbers. It remains one of the oldest unsolved problems in mathematics.
mathematics-logic
global-unspecified
haven
solved
whether
every
even
number
greater
sum
primes
numbers
know
possible
philosophy-ethics
resolved
mathematical
open
Global / Unspecified, Global
This century-old conjecture predicts a hidden pattern in how prime numbers are distributed, but nobody has ever proven it true. A proof would deepen our understanding of numbers in ways that ripple into cryptography and physics.
mathematics-logic
global-unspecified
numbers
proven
understanding
prime
haven
riemann
hypothesis
central
century-old
conjecture
know
whether
possible
every
mathematical
philosophy-ethics