A034923 - OEIS

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A034923

Numbers n such that 43^n-42 is prime.

4, 6, 42, 64, 65, 1017 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Related to hyperperfect numbers of a certain form.` `The 1017 term produces a 1662-digit number which is only a probable prime. Any additional terms are greater than 1500.`
	LINKS	`J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3`
	PROG	`(PARI) for(n=2, 1500, if(isprime(43^n-42), print1(n, ", ")))`
	CROSSREFS	`Sequence in context: A175349 A023644 A145387 * A013022 A012908 A077100` `Adjacent sequences: A034920 A034921 A034922 * A034924 A034925 A034926`
	KEYWORD	`nonn`
	AUTHOR	`Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu)`
	EXTENSIONS	`One more term from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jun 21 2002`

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Last modified February 16 08:13 EST 2012. Contains 205893 sequences.