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 A086110 p=prime is substring of 2^p-1. 1

%I

%S 7,37,67,73,89,179,191,373,479,521,601,613,619,653,661,673,701,719,

%T 727,769,773,853,881,907,919,1553,1571,1693,1709,1747,1831,2003,2111,

%U 2137,2309,2347,2351,2543,2593,2707,2719,2837,3023,3361,3583,3613,3673,3727

%N p=prime is substring of 2^p-1.

%C n such that p=prime(n) is substring of 2^p-1 in A086109.

%e a(2)=37 because prime=37 is substring of 2^37-1=137438953471.

%t Select[Prime[Range[600]],SequenceCount[IntegerDigits[2^#-1],IntegerDigits[ #]]>0&] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Apr 30 2019 *)

%Y Cf. A086109.

%K easy,nonn,base

%O 0,1

%A _Zak Seidov_, Jul 10 2003

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Last modified September 19 19:28 EDT 2021. Contains 347564 sequences. (Running on oeis4.)