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A062579 Numbers n such that 13^n - 12^n is prime. 1
17, 31, 41, 47, 109, 163, 643, 2459, 9743, 30271, 87557 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms greater than 1000 may correspond to (unproven) strong pseudoprimes 13^n - 12^n. [Clarified by M. F. Hasler, Sep 16 2013]

LINKS

Table of n, a(n) for n=1..11.

PROG

(PARI) is(n)=ispseudoprime(13^n-12^n) \\ Charles R Greathouse IV, Jun 12 2017

CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A235920 A268923 A172287 * A134076 A258029 A321596

Adjacent sequences:  A062576 A062577 A062578 * A062580 A062581 A062582

KEYWORD

nonn,hard

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

EXTENSIONS

Two more terms 30271 and 87557 found by Jean-Louis Charton in 2007 and 2008 corresponding to probable primes with 33721 and 97534 digits. Jean-Louis Charton, Sep 02 2009

STATUS

approved

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Last modified July 13 13:20 EDT 2020. Contains 335687 sequences. (Running on oeis4.)