On 11/14/2011 05:57 AM, Marc Heiler wrote: > require "prime" > > > ^^^ Is this specific to Ruby 1.9.x ? Guess I should have looked at the other message closer. There's a Prime class in mathn but it's not the same as the one from Ruby 1.9. -- Darryl L. Pierce <mcpierce / gmail.com> http://mcpierce.multiply.com/ "What do you care what people think, Mr. Feynman?"