
 InfoSatellite.com  The Collatz Conjecture 
  That's the Collatz conjecture, also known as the 3n+1 conjecture, the Ulam conjecture or the Hailstone sequence, to which names Jeffrey C. Lagarias, which also discusses more deeply its implications at cecm.sfu.ca, adds mapping problem, Hasse's algorithm, Kakutani's problem, Syracuse algorithm, Syracuse problem, and Thwaites conjecture. 
  Paulos explains that The Collatz conjecture is that no matter what number you choose, you'll always end up with 4, 2, 1, 4, 2, 1,.... 
  One of the greatest numbers subjected to the Collatz conjecture that had its algorithm subjected to computerized calculation was described by its author in Oliveira e Silva, T. "Maximum Excursion and Stopping Time RecordHolders for the 3x+1 Problem: Computational Results". 
 www.infosatellite.com /news/2003/01/p070103collatz.html (861 words) 
