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%I #13 Sep 08 2022 08:45:17
%S 2,5,6,8,12,18,23,36,38,41,48,50,51,54,57,68,69,71,74,75,80,86,87,89,
%T 92,95,101,102,116,120,123,129,131,137,144,146,149,155,159,183,186,
%U 204,215,216,219,225,227,228,239,246,249,251,254,257,261,269,278,282
%N Numbers n such that 10000n + 1001 is prime.
%H Daniel Starodubtsev, <a href="/A105107/b105107.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) ~ 0.4n log n.
%e n=2: 21001 is prime.
%e n=69: 691001 is prime.
%o (Magma) [ n: n in [1..300] | IsPrime(Seqint([1, 0, 0, 1] cat Intseq(n))) ];
%o (PARI) is(n)=isprime(10000*n+1001) \\ _Charles R Greathouse IV_, Jun 06 2017
%K nonn,easy
%O 1,1
%A _Parthasarathy Nambi_, Apr 07 2005
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