A248546 Numbers k such that 75^k - 2 is prime.

1, 2, 25, 32, 62, 128, 848, 2091, 2882, 11761, 25915

Offset

1,2

Comments

Dedicated to N. J. A. Sloane for his 75th birthday!

Links

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

Mathematica

Select[Range[1000], PrimeQ[75^#-2]&]

Prog

(Magma) [n: n in [0..200] | IsPrime(75^n-2)]; // Vincenzo Librandi, Oct 08 2014
(PARI) is(n)=ispseudoprime(75^n-2) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Cf. A014224, A109080, A090669, A128455, A128457, A128458, A128459, A128460, A376850.

Sequence in context: A163497 A264118 A054292 * A369670 A038834 A041071

Adjacent sequences: A248543 A248544 A248545 * A248547 A248548 A248549

Keyword

nonn,more

Author

Vaclav Kotesovec, Oct 08 2014

Extensions

a(10) from Michael S. Branicky, Apr 02 2023

a(11) from Michael S. Branicky, Oct 10 2024

Status

approved