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A248546 Numbers n such that 75^n-2 is prime. 0
1, 2, 25, 32, 62, 128, 848, 2091, 2882 (list; graph; refs; listen; history; text; internal format)
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..9.

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.

Sequence in context: A163497 A264118 A054292 * A038834 A041071 A153478

Adjacent sequences:  A248543 A248544 A248545 * A248547 A248548 A248549

KEYWORD

nonn,more

AUTHOR

Vaclav Kotesovec, Oct 08 2014

STATUS

approved

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Last modified December 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)