id:A105428 - OEIS Search Results

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Smallest prime dividing the composite near-repdigit number 133...33 consisting of a 1 followed by n 3's, where n=A105427.

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7, 31, 67, 151, 23, 13, 7, 157, 163, 107, 17, 13, 7, 89, 170809, 31, 13, 7, 4363363, 251, 42169, 43, 13, 7, 641, 17, 6791, 109, 13, 7, 31, 29, 373, 261382937, 13, 7, 101921, 82647847, 443, 13, 7, 43, 1042402171, 71, 31, 13, 7, 1601, 425519761 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`M. Kamada, Factorizations of 133...33`
	PROGRAM	`(PARI) for(n=1, 100, m=10^n+(10^n-1)/3; if(!isprime(m), print1(factorint(m)[1, 1], " "))) (Alekseyev)`
	CROSSREFS	`Cf. A089018.` `Sequence in context: A000921 A135659 A031388 this_sequence A050547 A090684 A033199` `Adjacent sequences: A105425 A105426 A105427 this_sequence A105429 A105430 A105431`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Apr 08 2005`
	EXTENSIONS	`More terms from Max Alekseyev (maxal(AT)cs.ucsd.edu), Apr 11 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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