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The question is if modern particle accelerators (or cosmic rays for that matter) can create black holes. Has those events been detected? If not, how far are we in terms of orders of magnitude energy? Bonus question: is creating black holes scientifically interesting?

I've read this question, but the accepted answer is about string theory and politics. My question is about energies and devices required.

Qmechanic
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Quoting from Micro black hole - Minimum mass of a black hole:

In principle, a black hole can have any mass equal to or above about $2.2\times 10^{−8}$ kg or $22$ micrograms (the Planck mass).

Given this Planck mass (or the corresponding Planck energy $1.2\times 10^{19}$ GeV) it is far out of reach with any human particle accelerator technology.