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A260570 Numbers n such that (n^79+1)/(n+1) is prime. 1

%I #15 Sep 08 2022 08:46:13

%S 2,20,22,35,47,72,109,133,184,211,226,259,352,470,559,720,785,800,823,

%T 842,895,1003,1145,1172,1213,1291,1318,1375,1441,1453,1460,1461,1467,

%U 1477,1604,1608,1637,1654,1695,1703,1807,1831,1834,1903,1948,2035,2060,2065

%N Numbers n such that (n^79+1)/(n+1) is prime.

%H Tim Johannes Ohrtmann, <a href="/A260570/b260570.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[1, 10000], PrimeQ[(#^79 + 1)/(# + 1)] &]

%o (PARI) for(n=1,10000, if(isprime((n^79+1)/(n+1)), print1(n,", ")))

%o (Magma) [n: n in [1..10000] |IsPrime((n^79 + 1) div (n + 1))]

%Y Cf. A055494, A246392, A250174, A250178, A250181, A250185, A250187, A250193, A260558-A260573.

%K nonn

%O 1,1

%A _Tim Johannes Ohrtmann_, Jul 29 2015

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)