
Glossary: Prime Pages: Top 5000: 
A triadic (or 3way) prime is one
which is invariant upon reflection only along the line they are
written on, so the digits may be 0, 1, 3, and 8. (Trigg
called these palindromic reflectable in
[Trigg83].) A large example of this kind is
10...0111013101110...01where each string of zeros (0...0) is 2509 zeros long!
See Also: Palindrome, Tetradic, Strobogrammatic References:
Chris K. Caldwell © 19992017 (all rights reserved)
