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A030997 Smallest prime which is a concatenation of n consecutive primes. 7
2, 23, 5711, 2357, 711131719, 113127131137139149, 29313741434753, 107109113127131137139149, 211223227229233239241251257, 691701709719727733739743751757, 2329313741434753596167 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Hans Havermann, Table of n, a(n) for n = 1..100

EXAMPLE

a(5) = 711131719 is the smallest prime which is the concatenation of five consecutive primes 7,11,13,17 and 19.

PROG

(PARI) for(k=1, 19, for(i=0, 1e9, isprime( eval( p=concat( vector( k, j, Str( prime( i+j )))))) & break); print1(p, ", ")) \\ M. F. Hasler, Nov 10 2009

CROSSREFS

Cf. A030996, A068655, A030473, A086041, A099727, A167517.

Sequence in context: A087388 A117507 A068656 * A090511 A114256 A110714

Adjacent sequences:  A030994 A030995 A030996 * A030998 A030999 A031000

KEYWORD

nonn,base

AUTHOR

Patrick De Geest Warut Roonguthai

STATUS

approved

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Last modified March 24 00:25 EDT 2017. Contains 283983 sequences.