First cosmological hydro simulations with directly modeled PBHs show 1000 solar mass PBHs can grow to 10^4 to 10^5 solar masses by z=20 only if f_PBH is around 10^-3, not 10^-4.
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Primordial black holes in cosmological simulations: growth prospects for supermassive black holes
First cosmological hydro simulations with directly modeled PBHs show 1000 solar mass PBHs can grow to 10^4 to 10^5 solar masses by z=20 only if f_PBH is around 10^-3, not 10^-4.