The Golden Mean or Ratio[(1+sqrt(5))/2] to 20,000 placesThis etext also contains these mathematical items: Catalan evaluation 170000 digits of gamma or Euler constant The Artin's Constant The Backhouse Constant Zeta(3) or Apery Constant Zeta(1,2) or the derivative of Zeta function at 2 Feigenbaum reduction parameter Feigenbaum bifurcation velocity constant Franson-Robinson constant The Gauss-Kusmin-Wirsing constant Khinchin constant Landau-Ramanujan constant The twin primes constant The Lengyel constant The Levy constant