Riesel

Riesel may refer to:

People

 * Hans Riesel (1929–2014), Swedish mathematician who discovered a Mersenne prime
 * Victor Riesel (1913–1995), American labor union journalist

In Mathematics

 * Riesel number, an odd natural number k for which the integers of the form k·2n−1 are all composite
 * Riesel Sieve, a project to prove the smallest Riesel number

Places

 * Riesel, Texas