|
|
A023260
|
|
Primes that remain prime through 2 iterations of function f(x) = 8x + 1.
|
|
3
|
|
|
2, 17, 101, 107, 401, 821, 947, 1151, 1487, 2027, 2207, 2411, 2741, 2927, 3851, 4391, 4691, 5231, 5861, 6701, 7001, 8297, 8807, 9341, 9587, 9851, 10067, 11117, 11447, 11897, 12107, 12911, 16187, 17657, 20681, 20771, 20807, 21221, 21227, 21491, 21521
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Primes p such that 8*p+1 and 64*p+9 are also primes. - Vincenzo Librandi, Aug 04 2010
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Prime[Range[2500]], And@@PrimeQ[Rest[NestList[8#+1&, #, 2]]]&] (* Harvey P. Dale, Jan 26 2013 *)
|
|
PROG
|
(Magma) [n: n in [1..100000] | IsPrime(n) and IsPrime(8*n+1) and IsPrime(64*n+9)] // Vincenzo Librandi, Aug 04 2010
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|