At what times during the Big Bang were all four fundamental forces unified?

Name: At what times during the Big Bang were all four fundamental forces unified?
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During the Planck era, up to $10^{-43}$ seconds after the start of the Big Bang, it is theorized that all four fundamental forces (gravitational, electromagnetic, strong nuclear, and weak nuclear forces) were unified. This era represents the earliest period in the universe's history, before the forces differentiated from each other.

At What Times During the Big Bang Were All Four