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A030997 Smallest prime which is a concatenation of n consecutive primes. 8
2, 23, 5711, 2357, 711131719, 113127131137139149, 29313741434753, 107109113127131137139149, 211223227229233239241251257, 691701709719727733739743751757, 2329313741434753596167 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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. A030461 (primes that are concatenations of two primes), A030469 (three primes), A030473 (four primes), A086041 (five primes).
Sequence in context: A087388 A117507 A068656 * A090511 A369993 A114256
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified May 29 20:00 EDT 2024. Contains 372952 sequences. (Running on oeis4.)