When Rimmer and Lister are arguing over whether Lister should go into stasis, Rimmer complains that Lister wants to "leave [him] alone for three million years". Very shortly afterwards, Rimmer exclaims "Mind? Mind? Why should I mind? Three hundred thousand millennia alone, while you're in suspended animation?"
Three hundred thousand millennia would be 3 x 100 x 1000 x 1000: three *hundred* million. The DVD subtitles give the correct version, "3000 millennia", but Chris Barrie definitely says "three hundred thousand"!