Regular prime

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This article defines a property that can be evaluated for a prime number. In other words, every prime number either satisfies this property or does not satisfy this property.
View other properties of prime numbers | View other properties of natural numbers

Definition

A regular prime is a prime number greater than 2 such that does not divide the class number of the cyclotomic number field .

A prime greater than 2 that is not a regular prime is termed an irregular prime.

Occurrence

Initial examples

3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 41, 43, 47, 53, 61, [SHOW MORE]View list on OEIS

Facts