

A282946


Numbers n such that 5*2^n + 1 is a prime factor of a generalized Fermat number 11^(2^m) + 1 for some m.


1




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..4.
Anders Björn and Hans Riesel, Factors of generalized Fermat numbers, Math. Comp. 67 (1998), no. 221, pp. 441446.
Anders Björn and Hans Riesel, Table errata to "Factors of generalized Fermat numbers", Math. Comp. 74 (2005), no. 252, p. 2099.
Anders Björn and Hans Riesel, Table errata 2 to "Factors of generalized Fermat numbers", Math. Comp. 80 (2011), pp. 18651866.
OEIS Wiki, Generalized Fermat numbers


MATHEMATICA

lst = {}; Do[p = 5*2^n + 1; If[PrimeQ[p] && IntegerQ@Log[2, MultiplicativeOrder[11, p]], AppendTo[lst, n]], {n, 1, 1947, 2}]; lst


CROSSREFS

Cf. A199592, A226366, A268661, A268662, A268663, A282945, A268664. Subsequence of A002254.
Sequence in context: A077730 A110103 A232305 * A319623 A208875 A199098
Adjacent sequences: A282943 A282944 A282945 * A282947 A282948 A282949


KEYWORD

nonn,hard,more


AUTHOR

Arkadiusz Wesolowski, Feb 25 2017


STATUS

approved



