# Wacław Sierpiński

**Waclaw Sierpiński** (∗ 1882-03-14; † 1969-10-21) was a Polish mathematician contributing in number theory and others.

In 1960 he proved there are infinitely many odd integers *k* (named after him Sierpiński numbers) such that all k×2^{n}+1 for all *n* are composite.