A062604 Numbers k such that 38^k - 37^k is prime.

3, 379, 383, 1373, 1609, 24611, 38281

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(8) > 10^5. - Robert Price, Sep 03 2012

Links

Table of n, a(n) for n=1..7.

Prog

(PARI) is(n)=ispseudoprime(38^n-37^n) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

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

Sequence in context: A136025 A370448 A157577 * A160192 A304424 A316279

Adjacent sequences: A062601 A062602 A062603 * A062605 A062606 A062607

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(6) and a(7) from Robert Price, Sep 03 2012

Status

approved