A062595 Numbers k such that 29^k - 28^k is prime.

3, 7219, 34871

Offset

1,1

Comments

Terms > 1000 are often only strong pseudoprimes.

a(4) > 10^5. - Robert Price, Sep 22 2012

Links

Table of n, a(n) for n=1..3.

Prog

(PARI) is(n)=ispseudoprime(29^n-28^n) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

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

Sequence in context: A056749 A281788 A134776 * A128147 A326391 A068918

Adjacent sequences: A062592 A062593 A062594 * A062596 A062597 A062598

Keyword

nonn,hard,bref

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(3) from Robert Price, Sep 22 2012

Status

approved