id:A103148 - OEIS Search Results

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Numbers n such that 2^n+25229 is prime.

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3, 5, 7, 9, 11, 19, 21, 29, 33, 41, 77, 81, 99, 101, 109, 119, 141, 145, 161, 163, 171, 183, 201, 209, 227, 241, 299, 303, 321, 367, 395, 413, 459, 501, 689, 777, 889, 989, 1317, 1839, 2027, 2197, 2571, 3041, 3143, 4541, 4701, 5265, 5463, 6449, 7061, 7289, 9291, 9663, 12287, 17441, 23033, 23297, 26543, 32939, 33543 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`This is the longest sequence that I have found of the class "2^n+/-(odd integer) is prime".`
	EXAMPLE	`2^3+25229 = 25237 is prime` `2^11+25229 = 27277 is prime` `2^2+25229 = 25233 = 3x13x647`
	MATHEMATICA	`Do[If[PrimeQ[2^n + 25229], Print[n]], {n, 33600}]`
	CROSSREFS	`Cf. A094076, A000043.` `Adjacent sequences: A103145 A103146 A103147 this_sequence A103149 A103150 A103151` `Sequence in context: A071643 A039578 A033032 this_sequence A071240 A088049 A029660`
	KEYWORD	`nonn`
	AUTHOR	`Lei Zhou (lzhou5(AT)emory.edu), Feb 03 2005`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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