How many believers were there at the time of the ascension?

How many believers were there at the time of the ascension?
There were 120 believers after the ascension.	There were more than 500 believers before the ascension.
Acts 1:15 The number of names together were about an hundred and twenty.	1 Corinthians 15:6 He was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep.