Here is an article on TheMindUnleased.com describing the discovery of the true nature of a

3,700-year-old cracked clay tablet rests in the Columbia University collections, marked “Plimpton 322.”

and its advantageous base sixty mathematics:

http://themindunleashed.com/2017/08/ancient-tablet-found-hold-mathematical-secrets-nearly-century-study.html

Here is a sample of the tablet by the Guardian