Editing Regular prime (section)

{{Short description|Type of prime number}}
{{distinguish|regular number}}
{{unsolved|mathematics|Are there infinitely many regular primes, and if so, is their relative density <math>e^{-1/2}</math>?}}

In [[number theory]], a '''regular prime''' is a special kind of [[prime number]], defined by [[Ernst Kummer]] in 1850 to prove certain cases of [[Fermat's Last Theorem]]. Regular primes may be defined via the [[divisibility]] of either [[class number (number theory)|class numbers]] or of [[Bernoulli number]]s.

The first few regular odd primes are:
: 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 41, 43, 47, 53, 61, 71, 73, 79, 83, 89, 97, 107, 109, 113, 127, 137, 139, 151, 163, 167, 173, 179, 181, 191, 193, 197, 199, ... {{OEIS|id=A007703}}.