login
Numbers n such that the string 53n is the decimal expansion of a prime number.
0

%I #9 Sep 08 2022 08:45:18

%S 23,33,47,51,81,87,93,99,101,113,117,129,147,149,161,171,173,189,197,

%T 201,231,233,239,267,269,279,281,299,309,323,327,353,359,377,381,401,

%U 407,411,419,437,441,453,479,503,507,527,549,551,569,591,593,597,609

%N Numbers n such that the string 53n is the decimal expansion of a prime number.

%e n=113 is in the sequence because 53113 is prime.

%o (Magma) [ n: n in [1..700] | IsPrime(Seqint(Intseq(n) cat [3, 5])) ];

%K nonn,base

%O 1,1

%A _Parthasarathy Nambi_, Jun 07 2005