Query about Question 6 from "PrepSwift: # of Numbers in Factorials II" [12371] - Why 71?

GRE GRE Quant Problem Solving
1

https://www.gregmat.com/quizzes/quiz/of-numbers-in-factorials-ii-quiz (Question #6)

I’m still very confused as to why the answer here is 71, not 66.

2

Kindly refer to Incomplete/poor explanation of Question 6 from "PrepSwift: # of Numbers in Factorials II" [12371] - #2 by Kweku

Lemme know if it is still unclear.