It is difficult to give a precise answer to this question because the number of characters that an individual can remember can vary greatly depending on a number of factors, such as their age, education, language background, and memory skills.

However, research has shown that the average person can remember between 5 and 9 items (such as words, numbers, or characters) in their short-term memory, with some studies suggesting a number as low as 4 and others as high as 15.