Snowmass2021 Cosmic Frontier White Paper:Primordial Black Hole Dark
  Matter
  Primordial Black Holes (PBHs) are a viable candidate to comprise some or all
of the dark matter and provide a unique window into the high-energy physics of
the early universe. This white paper discusses the scientific motivation,
current status, and future reach of observational searches for PBHs. Future
observational facilities supported by DOE, NSF, and NASA will provide
unprecedented sensitivity to PBHs. However, devoted analysis pipelines and
theoretical modeling are required to fully leverage these novel data. The
search for PBHs constitutes a low-cost, high-reward science case with
significant impact on the high energy physics community.
