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%I #11 Aug 08 2014 12:43:54
%S 73,719,743,761,773,797,7103,7109,7127,7151,7193,7211,7229,7283,7307,
%T 7331,7349,7433,7457,7487,7499,7523,7541,7547,7577,7607,7643,7673,
%U 7691,7727,7757,7823,7829,7853,7877,7883,7907,7919,7937,71039,71069,71129,71153
%N Primes obtained from other primes by prefixing a 7.
%C The primes are considered in increasing order.
%H Harvey P. Dale, <a href="/A167187/b167187.txt">Table of n, a(n) for n = 1..1000</a>
%e 7151 is a prime obtained by prefixing a 7 to the prime 151.
%t Select[FromDigits[Join[{7},IntegerDigits[#]]]&/@Prime[Range[250]],PrimeQ] (* _Harvey P. Dale_, Aug 08 2014 *)
%Y Cf. A000040, A165243, A165292, A165444
%K base,nonn
%O 1,1
%A _Parthasarathy Nambi_, Oct 29 2009
%E More terms (a(11)-a(42) from _Vincenzo Librandi_, Nov 01 2009
%E Corrected (a(15)=7307 inserted) by _Harvey P. Dale_, Aug 08 2014
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