What is the first-ever painting painted and who is the artist?

According to researchers it is the one in Chauvet Cave in France, painted by Neanderthals.

Explanation:

Chauvet Cave (also known as Chauvet-Pont d'Arc) is currently the oldest known art in the world, apparently dating from the Aurignation period in France 30,000-32,000 years ago. The cave is located in the Pont-d'Arc Ardèche Valley, France, at the entrance to the Ardèche Gorges between Cevennes and the Rhône Valley. It extends horizontally to almost 500 meters (about 1,000 meters) into the ground, and consists of two main rooms separated by a narrow corridor. Over 420 paintings have been documented in the cave, including numerous real animals (deer, horses, rhinos, bison, lions, cave bears), human hand prints and abstract dots. The images of the front hall are primarily red, created by liberal applications of the red hall, while those in the rear hall are mostly black designed, carved with charcoal.

Answer humanism;