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A167187 Primes obtained from other primes by prefixing a 7. 1
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 (list; graph; refs; listen; history; text; internal format)
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 A133753 A112750

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

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Last modified April 29 11:38 EDT 2017. Contains 285604 sequences.