id:A109309 - OEIS Search Results

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Larger emirps (primes whose digit reversal is a lesser prime).

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31, 71, 73, 97, 311, 701, 733, 743, 751, 761, 907, 937, 941, 953, 967, 971, 983, 991, 1201, 1301, 1321, 1511, 1601, 1741, 1811, 1831, 1901, 3011, 3121, 3191, 3203, 3221, 3251, 3271, 3301, 3371, 3391, 3433, 3511, 3541, 3571, 3613, 3643, 3733, 3803, 3821 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Cf. A006567 Emirps (primes whose digit reversal is a different prime), A109308 Lesser emirps (primes whose digit reversal is a larger prime).`
	MATHEMATICA	`dr[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Select[Prime[Range[1000]], PrimeQ[dr[ # ]]&&dr[ # ]<#&]`
	CROSSREFS	`Cf. A006567, A109308.` `Sequence in context: A110831 A086042 A086051 this_sequence A127191 A003542 A055781` `Adjacent sequences: A109306 A109307 A109308 this_sequence A109310 A109311 A109312`
	KEYWORD	`base,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Jun 25 2005`

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

AT&T Labs Research