A032360 - OEIS

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A032360

Numbers n such that 21*2^n+1 is prime.

1, 4, 5, 7, 9, 12, 16, 17, 41, 124, 128, 129, 187, 209, 276, 313, 397, 899, 1532, 1613, 1969, 2245, 2733, 4585, 4644, 6712, 6981, 13344, 17524, 27124, 29769, 47337, 55828, 91008, 94801, 164901, 179457, 191337, 200568, 220992 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Ray Ballinger, Proth Search Page` `Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300` `Y. Gallot, Proth.exe: Windows Program for Finding Large Primes` `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`
	CROSSREFS	`Sequence in context: A035243 A035255 A047493 * A117150 A052147 A139690` `Adjacent sequences: A032357 A032358 A032359 * A032361 A032362 A032363`
	KEYWORD	`nonn,hard`
	AUTHOR	`Jim Buddenhagen (jbuddenh(AT)gmail.com)`
	EXTENSIONS	`More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 20 2003`

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Last modified February 16 08:09 EST 2012. Contains 205888 sequences.