Linked from
The 20 pages that link to Prime ideal, each with the reason it gives.
Ring of integersRelated: Prime ideals replace prime elements when elements do not factor uniquely.
Dedekind domainRelated: Nonzero prime ideals are the building blocks of ideals in a Dedekind domain.
Hilbert class fieldRelated: Unramified prime ideals are the inputs to the Artin map.
Krull's theoremRelated: Every maximal ideal in a commutative ring with identity is prime.