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

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

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard

Comments

Terms greater than 1000 are often only strong pseudoprimes.

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

Crossrefs

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

Programs

PARI

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

Extensions

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