id:A118504 - OEIS Search Results

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Sophie Germain primes for which the sum of the digits is also a Sophie Germain prime.

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2, 3, 5, 11, 23, 29, 41, 83, 113, 131, 173, 191, 281, 443, 641, 911, 1013, 1019, 1031, 1103, 1451, 1499, 1811, 1901, 2003, 2063, 2351, 2399, 2939, 3299, 3389, 3413, 4793, 4919, 5051, 5279, 5303, 5501, 5639, 6113, 6131, 6269, 6449, 7079, 7103, 7121, 7211 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`191 is in the sequence because (1) it is a Sophie Germain prime and (2) the sum of its digits 1+9+1=11 is also a Sophie Germain prime.`
	CROSSREFS	`Cf. A005384.` `Sequence in context: A131101 A005384 A118571 this_sequence A038905 A019405 A079848` `Adjacent sequences: A118501 A118502 A118503 this_sequence A118505 A118506 A118507`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), May 06 2006; corrected May 12 2006`
	EXTENSIONS	`Corrected by T. D. Noe (noe(AT)sspectra.com), Oct 25 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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