According to Official Guinness Records,
Pablo Diego José Francisco de Paula Juan Nepomuceno de los Remedios Crispín Cipriano de la Santísima Trinidad Ruíz y Picasso (1881-1973) of Spain was the most prolific of all professional painters in a career which lasted 75 years. It has been estimated that Picasso produced about 13,500 paintings and designs, 100,000 prints and engravings, 34,000 book illustrations and 300 sculptures and ceramics. His oeuvre has been valued at £500 million (US$788millon).
Picasso was a masterfully erratic pioneer with a hand in every art movement of the century.
For a complete list of 1881 records, please visit 1881 Guinness Records in Spain.