---
tag: 4Z5ZF5EB4Y
kind: conjecture
name: Siegel's conjecture
sources:
  - wikipedia: en:183091@r1376385932
    locator: List of unsolved problems in mathematics, section Unsolved problems > Number theory > Prime numbers
    note: adopted
    mention: wikipedia://en/183091#V1WG
    sections: [Statement]
inventory: [Q7MSR8QXBD]
---

## Statement

- Siegel's conjecture: are there infinitely many regular primes, and if so is their natural density as a subset of all primes $e^{-1/2}$?