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Search: id:A088639
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| A088639 |
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Smallest prime beginning with at least n n's (in decimal notation). |
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+0
3
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| 2, 11, 223, 3331, 44449, 555557, 66666629, 777777701, 888888883, 99999999907, 1010101010101010101039, 11111111111111111111111, 12121212121212121212121223, 1313131313131313131313131301
(list; graph; listen)
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OFFSET
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0,1
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LINKS
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M. F. Hasler, Table of n, a(n) for n=0,...,100.
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PROGRAM
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(PARI) A088639(n)={ local(p=10^#Str(n), d=1); n*=(p^n-1)/(p-1); until( (d*=10)*(n+1)>p=nextprime(n*d), ); p} /* M. F. Hasler, Jan 13 2009 */
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CROSSREFS
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Cf. A088640. See A068120 for another version. See also A065584 - A065592.
Sequence in context: A036229 A104337 A042805 this_sequence A162385 A134096 A132571
Adjacent sequences: A088636 A088637 A088638 this_sequence A088640 A088641 A088642
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 27 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 01 2003
PARI code, b-file, more cross-references and initial term added by M. F. Hasler (MHasler(AT)univ-ag.fr), Jan 13 2009
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