Editing Chaitin's constant (section)

== Relationship to the halting problem ==
Knowing the first {{mvar|N}} bits of {{math|&Omega;}}, one could calculate the [[halting problem]] for all programs of a size up to {{mvar|N}}. Let the program {{mvar|p}} for which the halting problem is to be solved be {{mvar|N}} bits long. In [[Dovetailing (computer science)|dovetailing]] fashion, all programs of all lengths are run, until enough have halted to jointly contribute enough probability to match these first {{mvar|N}} bits. If the program {{mvar|p}} has not halted yet, then it never will, since its contribution to the halting probability would affect the first {{mvar|N}} bits. Thus, the halting problem would be solved for {{mvar|p}}.

Because many outstanding problems in number theory, such as [[Goldbach's conjecture]], are equivalent to solving the halting problem for special programs (which would basically search for counter-examples and halt if one is found), knowing enough bits of Chaitin's constant would also imply knowing the answer to these problems. But as the halting problem is not generally solvable, calculating any but the first few bits of Chaitin's constant is not possible for a universal language. This reduces hard problems to impossible ones, much like trying to build an [[Oracle machine#Oracles and halting problems|oracle machine for the halting problem]] would be.