Circular Prime Numbers
by Science Photo Library
Title
Circular Prime Numbers
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Circular prime numbers arranged in a room. These are primes that remain primes when digits are rotated either from the left or right. Sometimes only the lowest number is included in the set (for example: 17, but not 71). With the exception of 2 and 5 all circular primes consist only of digits 1, 3, 7, 9. It is conjectured that there are an infinite number of circular primes (although only a small number of circular primes are actually known). This is based on the premise that repunit primes (consisting only of units, and therefore circular by default) are infinite in number.
Uploaded
July 27th, 2016
Embed
Share
