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A165292 Primes obtained from other primes by pre-concatenating with 3. 6
37, 311, 313, 317, 331, 337, 347, 353, 359, 367, 373, 379, 383, 389, 397, 3109, 3137, 3163, 3167, 3181, 3191, 3229, 3251, 3257, 3271, 3307, 3313, 3331, 3347, 3359, 3373, 3389, 3433, 3449, 3457, 3461, 3463, 3467, 3491, 3499, 3541, 3547, 3557, 3571, 3593 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The primes are considered in increasing order. These primes are obtained by adding 30, 300, 3000, ... to other primes.
LINKS
Chris Caldwell, The First 10,000 Primes
EXAMPLE
The prime 3389 is obtained from the prime 389 by pre-concatenating with 3.
MATHEMATICA
Select[(FromDigits[Join[{3}, IntegerDigits[#]]]&/@Prime[Range[200]]), PrimeQ] (* Harvey P. Dale, Mar 04 2011 *)
CROSSREFS
Sequence in context: A217642 A197340 A165373 * A114785 A061014 A130450
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Sep 13 2009
EXTENSIONS
359 inserted by R. J. Mathar, Sep 21 2009
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)