id:A057630 - OEIS Search Results

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Primes such that replacing each digit d with d copies of the digit d produces a prime. Zeros are allowed.

+0
2

11, 31, 53, 101, 131, 149, 223, 283, 311, 313, 331, 397, 463, 503, 641, 691, 937, 941, 1031, 1049, 1069, 1301, 1409, 1439, 1511, 1609, 1741, 1871, 1949, 1993, 1999, 2083, 2111, 2203, 2447, 2803, 2939, 3001, 3011, 3061, 3163, 3301, 3391, 3433, 3499, 3559 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`E.g. 641 becomes 66666644441 which is also prime.`
	CROSSREFS	`Cf. A057628.` `Sequence in context: A043124 A043904 A031287 this_sequence A057628 A031372 A028877` `Adjacent sequences: A057627 A057628 A057629 this_sequence A057631 A057632 A057633`
	KEYWORD	`nonn,base,nice,easy`
	AUTHOR	`G. L. Honaker, Jr. (honak3r(AT)bvunet.net), Oct 10 2000`
	EXTENSIONS	`More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 2000.`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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