Tredo-  (English, Paperback, Liu Xiyun)

It is more a work of form than of content, done in limited space and time. Irrelevant passers-by are highly recommended not to waste time on it, for it is dedicated to one and only one figure. Blankness bears information too. If any environmentalist should run into this work accidentally and deem it a waste of paper, please beware that it is the mistake of the choice of the carrier of information, rather than the information itself. It is a primorial, a pronic number, a semiperfect number, the smallest sphenic number, the smallest prefix in the metric system, and the largest number such that all coprimes smaller than itself except for 1 are prime.