Emirp

From Wikipedia, the free encyclopedia

An emirp (prime spelt backwards) is a prime number that gives you a different prime when its digits are reversed (not a palindromic prime). Emirps are also called reversible primes.

The first emirps are 13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157... (sequence A006567 in OEIS)

All multi-digit, non-repunit permutable primes are emirps

In 2003 there was a distributed computing project called the Distributed Emirp Project, written as a science fair project by a high school student Zachary Tong. According to a forum post by said student, he made it into the Intel ISEF (International Science and Engineering Fair) with this project. The goal of the project was to find emirps using the method of distributed computing.

Some limited information can be found on this page (http://distributedcomputing.info/recent.html#emirp) regarding the project. (Note that the links are broken.)

Copies of the project's website may be found at Archive.org: http://web.archive.org/web/*/tong-web.com/emirp/