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A125780
Numbers n such that n^8 + 1, n^8 + 3, n^8 + 7 and n^8 + 9 are all prime.
3
5241160, 19083350, 24619690, 53634830, 56604020
OFFSET
1,1
MATHEMATICA
Do[If[(PrimeQ[x^8+1])&&(PrimeQ[x^8+3])&&(PrimeQ[x^8+7])&&(PrimeQ[x^8+9]), Print[x]], {x, 1, 30000000}] (*Artur Jasinski*)
Select[Range[567*10^5], AllTrue[#^8 +{1, 3, 7, 9}, PrimeQ]&] (* Harvey P. Dale, Oct 22 2024 *)
CROSSREFS
Cf. A125779.
Sequence in context: A257160 A254742 A333587 * A294988 A183746 A183706
KEYWORD
nonn,changed
AUTHOR
Artur Jasinski, Dec 11 2006
STATUS
approved