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A225191 Numbers n such that (15^n + 2^n)/17 is prime. 3

%I #21 Jul 29 2013 12:02:18

%S 3,67,199,479,563,2243,2579,6599,7951,10099,10909,13759

%N Numbers n such that (15^n + 2^n)/17 is prime.

%C All terms are odd primes.

%C a(13) > 10^5.

%t Select[Prime[Range[1, 100000]], PrimeQ[(15^# + 2^#)/17]&]

%o (PARI) forprime(p=3,10^6, if(ispseudoprime((15^p + 2^p)/17), print1(p,", ") ) ); \\ _Joerg Arndt_, Jul 29 2013

%Y Cf. A057181, A125956, A125957, A222265.

%K nonn,hard,more

%O 1,1

%A _Robert Price_, May 07 2013

%E Removed incorrect first term of "2".

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Last modified April 24 13:08 EDT 2024. Contains 371945 sequences. (Running on oeis4.)