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Search: id:A030997
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| A030997 |
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Smallest prime which is a concatenation of n consecutive primes. |
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+0
7
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| 2, 23, 5711, 2357, 711131719, 113127131137139149, 29313741434753, 107109113127131137139149, 211223227229233239241251257, 691701709719727733739743751757, 2329313741434753596167
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Eva-Maria Zschorn, Table of n, a(n) for n = 1..30
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EXAMPLE
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a(5) = 711131719 is the smallest prime which is the concatenation of five consecutive primes 7,11,13,17 and 19.
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PROGRAM
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(PARI) for(k=1, 19, for(i=0, 1e9, isprime( eval( p=concat( vector( k, j, Str( prime( i+j )))))) & break); print1(p, ", ")) [From M. F. Hasler (MHasler(AT)univ-ag.fr), Nov 10 2009]
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CROSSREFS
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Cf. A030996, A068655.
Cf. A030473, A086041, A099727, A167517. [From M. F. Hasler (MHasler(AT)univ-ag.fr), Nov 10 2009]
Sequence in context: A087388 A117507 A068656 this_sequence A090511 A114256 A110714
Adjacent sequences: A030994 A030995 A030996 this_sequence A030998 A030999 A031000
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KEYWORD
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nonn,base,new
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com) Warut Roonguthai (warut822(AT)yahoo.com)
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