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A057462 Numbers n such that 10*11^n + 1 is prime. 2

%I

%S 0,10,24,864,2440,9438,68272,148602

%N Numbers n such that 10*11^n + 1 is prime.

%C a(9) > 2*10^5. - _Robert Price_, Jan 19 2015

%t Do[ If[ PrimeQ[ 10*11^n + 1 ], Print[ n ] ], {n, 0, 1000} ]

%t Select[Range[0, 4000], PrimeQ[(10*11^# + 1)] &] (* _Vincenzo Librandi_, Sep 28 2012 *)

%o (PARI) is(n)=ispseudoprime(10*11^n+1) \\ _Charles R Greathouse IV_, Jun 13 2017

%K nonn

%O 1,2

%A _Robert G. Wilson v_, Sep 08 2000

%E a(5) from _Vincenzo Librandi_, Sep 28 2012

%E a(6)-a(8) from _Robert Price_, Jan 19 2015

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Last modified February 17 12:32 EST 2020. Contains 331996 sequences. (Running on oeis4.)