A062577 - OEIS

A062577

Numbers k such that 11^k - 10^k is prime.

3, 5, 19, 311, 317, 1129, 4253, 7699, 18199, 35153, 206081 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Terms greater than 1000 may correspond to unproven strong pseudoprimes.`
	LINKS	`Table of n, a(n) for n=1..11.` `Top probable primes of the form 11^p-10^p`
	PROG	`(PARI) is(n)=ispseudoprime(11^n-10^n) \\ Charles R Greathouse IV, Feb 17 2017`
	CROSSREFS	`Cf. A000043, A057468, A059801, A059802, A062572-A062666.` `Sequence in context: A291920 A172058 A303937 * A144743 A171862 A231627` `Adjacent sequences: A062574 A062575 A062576 * A062578 A062579 A062580`
	KEYWORD	`nonn,hard`
	AUTHOR	`Mike Oakes, May 18 2001, May 19 2001`
	EXTENSIONS	`Two more terms 18199 and 35153 from Jean-Louis Charton, Sep 02 2009` `New term 206081 found by Jean-Louis Charton in October 2011` `Edited by M. F. Hasler, Sep 16 2013`
	STATUS	`approved`