how many people were at trumps speech on the mall on the 24th

Trump claimed 45,000 people were there, but reporting from the event and crowd estimates suggest the turnout was much smaller, likely in the 5,000 to 8,600 range.

What was reported

• Trump’s own post said “at least 45,000 people” attended.

• One account based on on-the-ground estimates put attendance at roughly 5,000–7,000.

• Another estimate cited a more precise count of 8,647.

• Some outlets described the crowd as only about half full earlier in the evening, with empty space visible before he spoke.

Most likely answer

If you want the most defensible single number, around 8,600 people is the best cited estimate I found, though other reporting places it somewhat lower.

TL;DR

Trump said 45,000 ; independent reporting suggests far fewer , most likely roughly 5,000–8,600.