

A178251


Primes p such that p^3  2 is prime.


6



19, 31, 37, 67, 109, 151, 211, 241, 277, 367, 439, 457, 619, 691, 727, 787, 859, 967, 1087, 1171, 1471, 1489, 1531, 1579, 1951, 2131, 2287, 2791, 2851, 2971, 3061, 3319, 3511, 3547, 3559, 3739, 4129, 4357, 4447, 4507, 4591, 4651, 4789, 4801, 4831, 4951
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OFFSET

1,1


COMMENTS

Solutions of the equation n' + (n^32)' = 2, where n' is the arithmetic derivative of n.  Paolo P. Lava, Nov 09 2012


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000


EXAMPLE

6857 = prime(882) = 19^3  2, 19 = prime(8) is 1st term.
29789 = prime(3228) = 31^3  2, 31 = prime(11) is 2nd term.


MATHEMATICA

Select[Prime[Range[10000]], PrimeQ[#^3  2] &] (* Vincenzo Librandi, Mar 20 2014 *)


PROG

(Sage) a = list(p for p in primes(10000) if is_prime(p**32)) # D. S. McNeil, May 25 2010
(MAGMA) [p: p in PrimesUpTo(5000)  IsPrime(p^32)]; // Vincenzo Librandi, Nov 17 2010
(PARI) list(lim)=my(v=List()); forprime(p=2, lim, if(isprime(p^32), listput(v, p))); Vec(v) \\ Charles R Greathouse IV, Feb 08 2016


CROSSREFS

Cf. A000040, A000578, A038599, A038600, A144953.
Sequence in context: A279192 A159043 A040088 * A164320 A154418 A120337
Adjacent sequences: A178248 A178249 A178250 * A178252 A178253 A178254


KEYWORD

nonn,easy


AUTHOR

Ulrich Krug (leuchtfeuer37(AT)gmx.de), May 24 2010


EXTENSIONS

Base tag removed by D. S. McNeil, May 25 2010


STATUS

approved



