Do Odd Weird Numbers Exist?
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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): $70$