|
|
A140007
|
|
Primes of the form 20x^2+20xy+71y^2.
|
|
1
|
|
|
71, 191, 311, 599, 719, 839, 911, 1439, 1511, 1871, 2039, 2399, 2711, 3191, 3359, 3719, 4079, 4271, 4679, 4799, 4871, 5039, 5351, 5399, 5471, 5591, 5879, 6359, 6719, 6791, 6911, 7151, 8039, 8111, 8231, 8831, 8999, 9311, 9431, 9551, 9791
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Discriminant = -5280. See A139827 for more information.
|
|
LINKS
|
|
|
FORMULA
|
The primes are congruent to {71, 119, 191, 311, 551, 599, 719, 839, 911, 1079} (mod 1320).
|
|
MATHEMATICA
|
QuadPrimes2[20, -20, 71, 10000] (* see A106856 *)
|
|
PROG
|
(Magma) [p: p in PrimesUpTo(12000) | p mod 1320 in [71, 119, 191, 311, 551, 599, 719, 839, 911, 1079]]; // Vincenzo Librandi, Aug 04 2012
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|