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Palindromic primes with digit sum 7.
5

%I #7 Nov 06 2015 02:02:15

%S 7,151,313,10501,11311,30103,1201021,3001003,100050001,100131001,

%T 101030101,110111011,111010111,10000500001,1100011100011,

%U 1100101010011,100020010020001

%N Palindromic primes with digit sum 7.

%H Chai Wah Wu, <a href="/A070248/b070248.txt">Table of n, a(n) for n = 1..1111</a>

%t Do[p = Join[ IntegerDigits[n], Reverse[ Drop[ IntegerDigits[n], -1]]]; q = Plus @@ p; If[ PrimeQ[ FromDigits[p]] && q == 7, Print[ FromDigits[p]]], {n, 1, 10^7}]

%Y Cf. A002385, A070247 & A070249.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, May 05 2002

%E Edited by _Robert G. Wilson v_, May 15 2002