|
|
A167187
|
|
Primes obtained from other primes by prefixing a 7.
|
|
5
|
|
|
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
|
|
|
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
|
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|