A050904 - OEIS

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A050904

Numbers n such that 291*2^n-1 is prime.

2, 5, 9, 11, 17, 21, 29, 30, 33, 50, 59, 62, 137, 161, 281, 290, 533, 842, 1410, 1553, 4794, 5529, 5661, 7013, 7470, 19605, 63477, 72513, 152942, 201494, 220562, 236117, 291705, 313433, 372342, 386430, 389225, 531347, 565917, 810347, 832410 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`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: A067568 A190329 A189522 * A057471 A099434 A191104` `Adjacent sequences: A050901 A050902 A050903 * A050905 A050906 A050907`
	KEYWORD	`hard,nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 29 1999`
	EXTENSIONS	`More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008`

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.