An example of extreme angular momentum
A black hole rotating at 93,141.19853 miles per second, which means that the portion of its circumference in rotation per second equals: 1/3.172429211x10ˆ14 
I figured this from its diameter measured at 1.6 million light years and their measurement of its rotation at 1/2 the speed of light. - (Assuming these values are correct, this only seems to be slow, but one-half the speed of light is still a very high speed of rotation.)
     Even rotating at one-half the speed of light, as big as it is, it still takes 10,053,096.49* years to rotate just once! - (Again, assuming their diameter measurement of 1.6 million light years is correct.)
*[2.954838504x10ˆ19 miles/93,141.19853/60/60/24/365.24]
     As I've talked about before, black holes do not form without extreme angular momentum of rotation, as this case proves at half the speed of light. - [See detailed notes below.]
For more on this subject see The New Meta-physics Paradigm community here: 
To obtain a copy of my book which includes this subject: - Thanks. --RK

[One light year = 5.878464425x10ˆ12 miles
 Diameter = 1,600,000 light years or 9.40554308x10ˆ18 miles
 Circumference = Diameter X π(pi) = 2.954838504x10ˆ19 miles
 Rotational Speed = 0.5x_c_ = 93,141.19853 miles per second
 Circumference ÷ Rotational speed = 1/3.172429211x10ˆ14
    (portion of circumference in rotation per second)]
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