# Wacław Sierpiński

**Waclaw Sierpinski** (∗ 14. March 1882; † 21. October 1969) was a Polish mathematician contributing in number theory and others.

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