A125780 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A125780

Numbers n such that n^8 + 1, n^8 + 3, n^8 + 7 and n^8 + 9 are all prime.

%I #6 Oct 22 2024 16:37:09

%S 5241160,19083350,24619690,53634830,56604020

%N Numbers n such that n^8 + 1, n^8 + 3, n^8 + 7 and n^8 + 9 are all prime.

%t 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*)

%t Select[Range[567*10^5],AllTrue[#^8 +{1,3,7,9},PrimeQ]&] (* _Harvey P. Dale_, Oct 22 2024 *)

%Y Cf. A125779.

%K nonn

%O 1,1

%A _Artur Jasinski_, Dec 11 2006