Andrew Nick’s Reviews > Here's Looking at Euclid: A Surprising Excursion Through the Astonishing World of Math > Status Update

"Persistence". The reasoning in the book that shows why the persistence of a number is never greater than 11--because eventually there is a "0" digit, and then it collapses--seems specious, since you could avoid that by ensuring the number you select does not have a "0" or "5" digit to begin with, no? I dunno ...