In this time, low estimate for the time until all objects
exceeding the Planck mass collapse via quantum tunnelling into
black holes, assuming no proton decay or virtual black holes. On
this vast timescale, even ultra-stable iron stars are destroyed by
quantum tunnelling events. First iron stars of sufficient mass will
collapse via tunnelling into neutron stars. Subsequently neutron
stars and any remaining iron stars collapse via tunnelling into
black holes. The subsequent evaporation of each resulting black
hole into sub-atomic particles (a process lasting roughly 10^100
years) is on these timescales instantaneous.