id:A109959 - OEIS Search Results

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Numbers n such that concatenating n and the sum of primes dividing n (counting multiplicity) produces a prime.

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10, 12, 14, 22, 38, 82, 90, 92, 96, 116, 117, 122, 134, 147, 158, 165, 178, 198, 210, 218, 236, 262, 274, 304, 314, 332, 333, 352, 358, 360, 369, 387, 390, 399, 420, 448, 454, 478, 482, 496, 522, 561, 562, 603, 605, 622, 637, 639, 640, 651, 694, 704, 714, 720 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`7^50+144 generates a 62 digit prime.`
	EXAMPLE	`a(5)=38 because 38=2*19 and 19+2=21 and 3821 is prime.`
	CROSSREFS	`Cf. A001414, A109958.` `Sequence in context: A088170 A116612 A068502 this_sequence A161990 A030591 A006793` `Adjacent sequences: A109956 A109957 A109958 this_sequence A109960 A109961 A109962`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 06 2005`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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