We haven't solved whether every even number greater than two is the sum of two primes.
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.
Citation ID: WS00135
Title: We haven't solved whether every even number greater than two is the sum of two primes.
URL: https://worldsolve.org/index.php?api=problem&id=135