# Anning's Theorem/Historical Note

## Historical Note on Anning's Theorem

**Anning's Theorem** appears as a problem in The $1970$ publication *250 Problems in Elementary Number Theory* by Wacław Sierpiński, who cites N. Anning as its source.

Confusingly, later he refers to **P. Anning** in the context of the same result. It can be assumed that this is a mistake.

It is apparent that this result was published in volume $22$ of *Scripta Mathematica*, but it has not been possible to find an online archive to confirm this, or even to determine what the title is of the article it appeared in.

The name **Anning's Theorem** has been coined by $\mathsf{Pr} \infty \mathsf{fWiki}$ as a convenient way to refer to this result, whose description would otherwise be too unwieldy for convenience.