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A104931 Primes from merging of 8 successive digits in decimal expansion of (Pi^2). 1

%I #12 Apr 24 2013 03:25:14

%S 61883449,83449099,51135313,19205243,43001773,34812203,76779851,

%T 76609903,12328403,26058169,92048309,73270033,27003307,62666711,

%U 11043589,15041003,32578853,65952763,37922683,41250269,25026973

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

%H Vincenzo Librandi, <a href="/A104931/b104931.txt">Table of n, a(n) for n = 1..1000</a>

%H <a href="http://mathworld.wolfram.com/Pi.html">Pi</a> as defined at MathWorld.com

%H <a href="http://www.gutenberg.org/ebooks/634">Expansion of Pi^2</a> done to 10,000 digits as part of Project Gutenberg.

%t Select[FromDigits/@Partition[RealDigits[Pi^2, 10, 500][[1]], 8, 1], #>10000000&&PrimeQ[#]&] (* _Vincenzo Librandi_, Apr 24 2013 *)

%K nonn,base

%O 1,1

%A Andrew G. West (WestA(AT)wlu.edu), Mar 29 2005

%E Changed offset from 0 to 1 by _Vincenzo Librandi_, Apr 24 2013

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)