|
|
A260335
|
|
Prime determinants of forms with class number > 2.
|
|
1
|
|
|
79, 223, 359, 439, 443, 499, 659, 727, 839, 1087, 1091, 1171, 1223, 1327, 1367, 1523, 1567, 1627, 1787, 1811, 1847, 1907, 1987, 2027, 2099, 2143, 2207, 2251, 2399, 2459, 2467, 2543, 2659, 2711, 2971, 3023, 3163, 3251, 3391, 3719, 3739, 3803, 3967, 4139, 4159, 4271
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Also primes p == 3 (mod 4) such that Z[sqrt(p)] = Z[x]/(x^2 - p) is not a unique factorization domain (or equivalently, not a principal ideal domain). - Jianing Song, Feb 17 2021
|
|
LINKS
|
|
|
PROG
|
(PARI) isA260335(p) = isprime(p) && (p%4==3) && quadclassunit(4*p)[1] > 1 \\ Jianing Song, Feb 17 2021
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|