  Primordial black holes created in the early Universe can constitute a
substantial fraction of dark matter and serve as seeds for early galaxy
formation. Binary primordial black holes with masses of the order of a few
dozen solar masses can explain the observed LIGO/Virgo gravitational-wave
events. In this Letter, we show that primordial black holes with log-normal
mass spectrum centered at $M_0\simeq 15-17 M_\odot$ simultaneously explain both
the chirp mass distribution of the detected LIGO/Virgo binary black holes and
the differential chirp mass distribution of merging binaries as inferred from
the LIGO/Virgo observations. The obtained parameters of log-normal mass
spectrum of primordial black holes also give the fraction of seeds with
$M\gtrsim 10^4 M_\odot$ required to explain the observed population of
supermassive black holes at $z=6-7$.
