Prime Curios!: 181

181
(another Prime Pages' Curiosity)

Curios:

Index
Keywords
Home
Glossary
Previous
Next
Random

Curios Search: Participate:

Mail Editor
Submit Curio
Prime Puzzio
Test Number

Single Curio View: (Seek other curios for this number)

The smaller prime in the first multidigit "Gridgeman pair." A Gridgeman pair is two palindromic primes, which differ only in that their middle digits are x and x + 1 respectively. These are named in honor of Norman T. Gridgeman (1912-1995) who conjectured that there are an infinite number of primes in this form. [King]

Submitted: 2004-04-08 17:16:49; Last Modified: 2009-09-06 13:52:45.