A107290 - OEIS

This site is supported by donations to The OEIS Foundation.

A107290

Numbers (M_k+2)/3 where M_k is a Mersenne prime > 6.

3, 11, 43, 2731, 43691, 174763, 715827883, 768614336404564651, 206323339880896712483187371, 54086425609737787797192670096043, 56713727820156410577229101238628035243 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`3,1`
	COMMENTS	`Many small values are prime; (M_89+2)/3 is the first composite.`
	LINKS	`Table of n, a(n) for n=3..13.` `C. K. Caldwell, The Prime Glossary, Bateman, Selfridge, Wagstaff; the New Mersenne Prime Conjecture`
	CROSSREFS	`Cf. A000668.` `Sequence in context: A000979 A123628 A153476 * A239392 A122393 A012880` `Adjacent sequences: A107287 A107288 A107289 * A107291 A107292 A107293`
	KEYWORD	`nonn`
	AUTHOR	`Yasutoshi Kohmoto (zbi74583(AT)boat.zero.ad.jp), May 22 2005`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), May 23 2005`
	STATUS	`approved`

Content is available under The OEIS End-User License Agreement .

Last modified September 11 02:29 EDT 2015. Contains 261512 sequences.