A062620 Numbers k such that 54^k - 53^k is prime.

2, 479, 1129, 2549, 11003

Offset

1,1

Comments

Terms greater than 1000 often correspond only to strong probable primes.

a(6) > 10^5. - Robert Price, Feb 18 2013

Links

Table of n, a(n) for n=1..5.

Prog

(PARI) is(n)=ispseudoprime(54^n-53^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A066152 A112862 A094484 * A108973 A087615 A027655

Adjacent sequences: A062617 A062618 A062619 * A062621 A062622 A062623

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(5) = 11003 found by Mike Oakes in Aug 2003. - Jean-Louis Charton, Aug 15 2012

Status

approved