A174268 Primes p such that 11^p-10 is also prime.

3, 17, 23, 79

Offset

1,1

Comments

a(5) > 15000. - Michael S. Branicky, Jul 26 2022

Links

Table of n, a(n) for n=1..4.

Example

For p=3, 11^3-10=1321;
for p=17, 11^17-10=505447028499293761;
for p=23, 11^23-10=895430243255237372246521.

Mathematica

Select[Range[10^4], PrimeQ[#] && PrimeQ[11^# - 10] &] (* Vincenzo Librandi, May 18 2015 *)
Select[Prime[Range[25]], PrimeQ[11^#-10]&] (* Harvey P. Dale, Jul 18 2022 *)

Prog

(Magma) [ p: p in PrimesUpTo(2500)| IsPrime(11^p-10)];

Crossrefs

Sequence in context: A128107 A154620 A175385 * A273834 A273850 A060860

Adjacent sequences: A174265 A174266 A174267 * A174269 A174270 A174271

Keyword

nonn,more

Author

Vincenzo Librandi, Mar 14 2010

Status

approved