A167187 Primes obtained from other primes by prefixing a 7.

73, 719, 743, 761, 773, 797, 7103, 7109, 7127, 7151, 7193, 7211, 7229, 7283, 7307, 7331, 7349, 7433, 7457, 7487, 7499, 7523, 7541, 7547, 7577, 7607, 7643, 7673, 7691, 7727, 7757, 7823, 7829, 7853, 7877, 7883, 7907, 7919, 7937, 71039, 71069, 71129, 71153

Offset

1,1

Comments

The primes are considered in increasing order.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Example

7151 is a prime obtained by prefixing a 7 to the prime 151.

Mathematica

Select[FromDigits[Join[{7}, IntegerDigits[#]]]&/@Prime[Range[250]], PrimeQ] (* Harvey P. Dale, Aug 08 2014 *)

Crossrefs

Cf. A000040, A165243, A165292, A165444

Sequence in context: A210390 A210383 A142675 * A177095 A321422 A133753

Adjacent sequences: A167184 A167185 A167186 * A167188 A167189 A167190

Keyword

base,nonn

Author

Parthasarathy Nambi, Oct 29 2009

Extensions

More terms (a(11)-a(42) from Vincenzo Librandi, Nov 01 2009

Corrected (a(15)=7307 inserted) by Harvey P. Dale, Aug 08 2014

Status

approved