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Primes from merging of 8 successive digits in decimal expansion of exp(2).
1

%I #7 Apr 27 2013 09:11:24

%S 38905609,70551847,22522573,52257379,91217947,78392213,33980777,

%T 89560741,54141467,92812933,33010193,51532081,84694793,94793029,

%U 47930299,13558771,14456831,56831239,83123923,98712281,87122813

%N Primes from merging of 8 successive digits in decimal expansion of exp(2).

%H Vincenzo Librandi, <a href="/A105004/b105004.txt">Table of n, a(n) for n = 1..1000</a>

%H The first <a href="http://www.worldwideschool.org/library/books/sci/math/MiscellaneousMathematicalConstants/chap21.html">5,000 digits of exp(2)</a> as calculated by _Simon Plouffe_ at WorldWideSchool.org.

%H Eric Weisstein, <a href="http://mathworld.wolfram.com/ExponentialFunction.html">Exponential Functions </a>

%t Select[FromDigits/@Partition[RealDigits[Exp[2], 10, 800][[1]], 8, 1], #>9999999&&PrimeQ[#]&] (* _Vincenzo Librandi_, Apr 26 2013 *)

%K nonn,base

%O 1,1

%A Andrew G. West (WestA(AT)wlu.edu), Mar 31 2005

%E Changed offset from 0 to 1 by _Vincenzo Librandi_, Apr 26 2013

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Last modified September 21 15:43 EDT 2024. Contains 376087 sequences. (Running on oeis4.)