We prove an explicit version of Weiss’ bound on the least norm of a prime ideal in
the Chebotarev density theorem, which is a significant improvement on the work of
Lagarias, Montgomery, and Odlyzko. As an application, we prove the first explicit,
nontrivial, and unconditional upper bound for the least prime represented by a
positive-definite primitive binary quadratic form. We also consider applications to
elliptic curves and congruences for the Fourier coefficients of holomorphic cuspidal
modular forms.
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Keywords
Chebotarev density theorem, least prime ideal, Linnik's
theorem, binary quadratic forms, elliptic curves, modular
forms, log-free zero density estimate