Registry · Theorem
III.T09
tau-effective
formalized
III.T09 — Primorial Cofinality
The primorial tower is cofinal: every ℤ/Nℤ maps to ℤ/Prim(k)ℤ for k large enough. Checking at primorial levels is SUFFICIENT. The cutoff k₀ is always computable.
Book III
Part 3
Ch. 14