A248547 Numbers n such that 75^n+2 is prime.

0, 12, 28, 53, 65, 504, 1967, 6915

Offset

1,2

Comments

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

Next term, if it exists, is greater than 10000.

Links

Table of n, a(n) for n=1..8.

Mathematica

Select[Range[0, 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. A051783, A087885, A090649, A109076, A138048, A113480, A138049, A138050.

Sequence in context: A107707 A183053 A126195 * A164533 A034319 A097427

Adjacent sequences: A248544 A248545 A248546 * A248548 A248549 A248550

Keyword

nonn,more

Author

Vaclav Kotesovec, Oct 08 2014

Status

approved