59 (number)

File:Seventeenth stellation of icosahedron.png

A regular icosahedron has 59 stellations.

59 (fifty-nine) is the natural number following 58 and preceding 60.

In mathematics

Fifty-nine is the 17th prime number, and 7th super-prime. It is also a good prime,<ref>Template:Cite web</ref> a Higgs prime,<ref>Template:Cite web</ref> an irregular prime,<ref>Template:Cite web</ref> a Pillai prime,<ref>Template:Cite web</ref> a Ramanujan prime,<ref>Template:Cite web</ref> a safe prime,<ref>Template:Cite web</ref> and a supersingular prime.<ref>Template:Cite web</ref> The next prime number is sixty-one, with which it comprises a twin prime.

There are 59 stellations of the regular icosahedron.<ref>H. S. M. Coxeter, P. Du Val, H. T. Flather, and J. F. Petrie. The Fifty-Nine Icosahedra.</ref>

In other fields

Fifty-nine is:

• The "59-minute rule" is an informal rule in business, whereby (usually near a holiday) employees may be allowed to leave work early, often to beat heavy holiday traffic (the 59 minutes coming from the rule that leaving one full hour early requires the use of leave, whereas leaving 59 minutes early would not).
• The number on a button commonly worn by feminist activists in the 1970s; this was based on the claim that a woman earned 59 cents to an equally qualified man's dollar.