|
|
A139976
|
|
Primes of the form 23x^2+6xy+23y^2.
|
|
2
|
|
|
23, 103, 127, 263, 367, 503, 607, 647, 727, 823, 887, 1063, 1223, 1303, 1327, 1447, 1543, 1583, 1663, 1823, 1847, 2063, 2207, 2287, 2383, 2447, 2687, 2887, 2903, 3407, 3527, 3623, 3727, 3767, 3823, 3847, 3943, 4007, 4423, 4447, 4463, 4567
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Discriminant=-2080. See A139827 for more information.
|
|
LINKS
|
|
|
FORMULA
|
The primes are congruent to {23, 87, 103, 127, 183, 207, 263, 287, 303, 367, 407, 503} (mod 520).
|
|
MATHEMATICA
|
Union[QuadPrimes2[23, 6, 23, 10000], QuadPrimes2[23, -6, 23, 10000]] (* see A106856 *)
|
|
PROG
|
(Magma) [p: p in PrimesUpTo(6000) | p mod 520 in [23, 87, 103, 127, 183, 207, 263, 287, 303, 367, 407, 503]]; // Vincenzo Librandi, Aug 03 2012
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|