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%I #16 Dec 18 2015 11:15:39
%S 3998993,7696967,7778777,7794977,7868687,7884887,7958597,9586859,
%T 9758579,9782879,9938399,138989831,139969931,148888841,148969841,
%U 157888751,159929951,166888661,167787761,168929861,169666961,174989471
%N Palindromic primes with digit sum = 50.
%H Chai Wah Wu, <a href="/A109207/b109207.txt">Table of n, a(n) for n = 1..13935</a>
%t Do[p=Join[IntegerDigits[n], Reverse[Drop[IntegerDigits[n], -1]]]; q=Plus@@p; If[PrimeQ[FromDigits[p]]&&q==50, Print[FromDigits[p]]], {n, 1, 10^7}] (* _Vincenzo Librandi_, Dec 18 2015 *)
%t Select[Prime@ Range[10^7], And[# == Reverse@ #, Total@ # == 50] &@ IntegerDigits@ # &] (* _Michael De Vlieger_, Dec 18 2015 *)
%o (PARI) isok(n) = isprime(n) && (d=digits(n)) && (Vecrev(d)==d) && (sumdigits(n)==50); \\ _Michel Marcus_, Dec 18 2015
%Y Cf. A070250, A109184, A109185 (resp.) Palindromic primes with digit sum = 10, 20, 40 (resp.); A107579, A106760 (resp.) Primes with digit sum = 10, 20 (resp.).
%K base,nonn
%O 1,1
%A _Zak Seidov_, Jun 22 2005
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