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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 Cf. A000040, A165243 Sequence in context: A217642 A197340 A165373 * A114785 A061014 A130450 Adjacent sequences:  A165289 A165290 A165291 * A165293 A165294 A165295 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 January 21 18:19 EST 2022. Contains 350479 sequences. (Running on oeis4.)