Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_76 (laps INTEGER, time_retired VARCHAR)
### Question:
What is the highest number of laps when the Time/Retired is differential?
### Answer:
SELECT MAX(laps) FROM table_name_76 WHERE time_retired = "differential"