3 ms·

The Lehmers are cool people… Ron’s got a train spotting site. http://calcoastrails.com/ http://calcoastrails.com/

• jrockway 11mo ago
  I knew about this site and knew about the Lucas-Lehmer test, but I never would have made the connection between the two. People are kind of amazing.
  • roflchoppa 11mo ago
    I knew Derrick Lehmer Jr before he passed away, just happened to know the name.