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Primero (in English also called Primus, Prime, or in Italian Primiera or Spanish Primera), is a 16th-century gambling card game of which the earliest reference dates back to 1526. Primero is closely related to the game of primo visto (a.k.a. prima-vista, and various other spellings), if not the same.
The gambling game with this name goes back to the 16th century, being known to Gerolamo Cardano as primiera, which he thought of as the noblest of all card games, to François Rabelais as prime, and to Shakespeare as primero.

Source: Wikipedia