When thinking of a list of digits in terms of racing times, one person is found to report up to 79 digits. this suggests that this person?

The answer is that "this person can remember this information due to a unique chunking strategy".

Chunking refers to a technique which is used to decrease the psychological load as the student forms data. The student groups content into little sensible units making the data less demanding to process. Basically, Chunking helps in the learning procedure by breaking long strings of data into bit estimate pieces that are less demanding to recollect.