id:A083988 - OEIS Search Results

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Primes p such that concatenation p, 0, R(p) is also a prime (of course a palindromic prime).

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31, 73, 139, 149, 163, 167, 173, 193, 197, 331, 347, 359, 367, 397, 719, 769, 911, 947, 967, 977, 1033, 1039, 1069, 1087, 1091, 1109, 1171, 1279, 1427, 1433, 1447, 1487, 1499, 1543, 1567, 1571, 1601, 1607, 1627, 1709, 1759, 1777, 1801, 1861, 1871, 1879 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Concatenation p and R(p) is a composite number (a multiple of 11).`
	EXAMPLE	`31 is a member as 31013 is also prime.` `139 is a member as 1390931 is also a prime.`
	CROSSREFS	`Sequence in context: A146353 A131633 A084655 this_sequence A070954 A141892 A155933` `Adjacent sequences: A083985 A083986 A083987 this_sequence A083989 A083990 A083991`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 22 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Dec 07 2004`

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Last modified March 19 01:26 EDT 2010. Contains 173632 sequences.

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