A050887 - OEIS

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A050887

Numbers n such that 257*2^n-1 is prime.

4, 6, 10, 16, 24, 60, 66, 82, 184, 256, 324, 424, 632, 756, 814, 872, 1114, 1702, 3282, 3420, 3862, 3864, 4162, 4510, 7030, 8410, 47974, 59236, 61084, 78034, 133980, 194312, 286832, 541402 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..34.` `Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300` `Wilfrid Keller, List of primes k.2^n - 1 for k < 300` `Index entries for sequences of n such that k2^n-1 (or k2^n+1) is prime` `Kosmaj, Riesel list k<300.`
	CROSSREFS	`Sequence in context: A075637 A027689 A023501 * A078642 A032416 A117149` `Adjacent sequences: A050884 A050885 A050886 * A050888 A050889 A050890`
	KEYWORD	`hard,nonn`
	AUTHOR	`N. J. A. Sloane, Dec 29 1999`
	EXTENSIONS	`More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008`
	STATUS	`approved`

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Last modified May 23 23:31 EDT 2013. Contains 225613 sequences.