|
|
A023284
|
|
Primes that remain prime through 3 iterations of function f(x) = 5x + 4.
|
|
3
|
|
|
83, 263, 1217, 1319, 1511, 1721, 1847, 1907, 2141, 2531, 4283, 4673, 5333, 6089, 6353, 6983, 7013, 7151, 7529, 8543, 10709, 10973, 11423, 15077, 15137, 17387, 17573, 20129, 20201, 20411, 20663, 21521, 23369, 23561, 25343, 26669, 27143, 27647, 28697
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Primes p such that 5*p+4, 25*p+24 and 125*p+124 are also primes. - Vincenzo Librandi, Aug 04 2010
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Prime[Range[3500]], And@@PrimeQ[Rest[NestList[5#+4&, #, 3]]]&] (* Harvey P. Dale, Feb 01 2013 *)
|
|
PROG
|
(Magma) [n: n in [1..150000] | IsPrime(n) and IsPrime(5*n+4) and IsPrime(25*n+24) and IsPrime(125*n+124)] // Vincenzo Librandi, Aug 04 2010
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|