Well, it's quite possible. 'Solo Leveling' has a large following, and if there is a novel version, it would likely cover the events of chapter 71. But you need to check the official sources or fan communities to be sure. Sometimes there could be differences in the pacing or additional details in the novel compared to the webtoon.
I don't have the exact chapter number off the top of my head. But you can usually find it easily by doing a quick search on popular online novel communities or dedicated Solo Leveling forums.
It's hard to say for sure. Different platforms and sources might have different chapter counts. Try looking on popular novel reading platforms or asking in related online communities for the most up-to-date chapter information.
I'm not sure exactly what happens in chapter 145 without reading it again. But generally, in 'Solo Leveling', each chapter is filled with intense battles and character development. It could be that the main character is facing a new and powerful enemy or achieving a new level of power himself.
It's hard to say which one is more popular as it depends on different factors. In some regions, the manga might be more popular because it appeals to those who like visual stories. The action - packed panels and the cool character designs can draw in a large audience. For example, in Japan, the manga format is very popular in general, so the solo leveling manga has a good chance of being well - received there.