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 A104930 Primes from merging of 7 successive digits in decimal expansion of (Pi^2). 1

%I #10 Apr 23 2013 18:56:15

%S 4010893,4490999,3699407,6264133,9205243,1976609,7808693,9666571,

%T 6571519,3526177,5920483,9818873,7626667,6711043,8715041,3659527,

%U 5952763,2763577,9547249,6475277,2206669,7889291,4432457,5617253

%N Primes from merging of 7 successive digits in decimal expansion of (Pi^2).

%H Vincenzo Librandi, <a href="/A104930/b104930.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]], 7, 1], #>1000000&&PrimeQ[#]&] (* _Vincenzo Librandi_, Apr 23 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 23 2013

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Last modified May 30 06:43 EDT 2024. Contains 372958 sequences. (Running on oeis4.)