"Until recently, scientists did not think it was possible for a stellar
black hole to have a mass larger than 20 times that of the sun.
But that assumption was metaphorically crushed in the gravity of a
“monster” black hole that scientists discovered inside our own galaxy. The hole has a mass 70
times that of the sun.
“No one has ever seen a 70-solar-mass stellar black hole anywhere,” Joel Bregman, one of the study authors and a professor of astronomy at the University of Michigan, said in an interview. “This is the first.”
The newly discovered black hole, named LB-1.....“Black holes of such mass should not even exist in our Galaxy, according to most of the current models of stellar evolution,” Liu Jifeng, a professor...“… Now theorists will have to take up the challenge of explaining its formation.”
Our own galaxy, the Milky Way, has a supermassive black hole in the center that has a mass of about 4 million suns. How supermassives form is unclear, Bregman said...." ePocket
How about this for how they form......THEY WERE CREATED
....in the day that the LORD God made the earth and the heavens,... Genesis 2:4