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A101249 Primes that are a concatenation of 5, 7 and a prime. 6
577, 5711, 5717, 5737, 5741, 5743, 5779, 5783, 57107, 57131, 57139, 57149, 57163, 57173, 57179, 57191, 57193, 57223, 57241, 57251, 57269, 57271, 57283, 57331, 57347, 57349, 57367, 57373, 57383, 57389, 57397, 57457, 57467, 57487, 57503 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
5711 is a prime concatenated from the primes 5,7 and 11.
MATHEMATICA
Select[ Table[ FromDigits[ Flatten[ IntegerDigits /@ {5, 7, Prime[n]}]], {n, 100}], PrimeQ[ # ] &] (* Robert G. Wilson v, Dec 20 2004 *)
CROSSREFS
Sequence in context: A031726 A154514 A278740 * A202011 A157264 A201046
KEYWORD
nonn,base,easy
AUTHOR
Parthasarathy Nambi, Dec 16 2004
EXTENSIONS
Extended by Ray Chandler and Robert G. Wilson v, Dec 22 2004
STATUS
approved

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Last modified March 3 06:28 EST 2024. Contains 370499 sequences. (Running on oeis4.)