|
|
A213428
|
|
Numbers k such that k^8 - prime(k) is prime.
|
|
2
|
|
|
6, 10, 12, 60, 72, 168, 174, 190, 204, 230, 290, 300, 396, 536, 628, 948, 972, 990, 1014, 1042, 1050, 1174, 1254, 1324, 1326, 1428, 1566, 1602, 1662, 1684, 1808, 1854, 1866, 1942, 1950, 2070, 2154, 2170, 2206, 2214, 2234, 2332, 2388, 2508, 2660, 2668, 2784
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
a(1) = 6 because 6^8 - prime(6) = 1679603 is prime.
|
|
MAPLE
|
P:= select(isprime, [2, seq(i, i=3..10^5, 2)]):
select(t -> isprime(t^8 - P[t]), [seq(i, i=2..nops(P), 2)]); # Robert Israel, Jun 02 2023
|
|
MATHEMATICA
|
Select[Range[3000], PrimeQ[#^8 - Prime[#]] &] (* T. D. Noe, Jun 11 2012 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|