Do Odd Weird Numbers Exist?

Open Question

It is not known whether there exist any odd weird numbers.


Historical Note

In $1971$, Paul Erdős offered $\$ 10$ as prize money for an example of an odd weird number, or $\$ 25$ for a proof that none exist.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $70$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $70$
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