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A273940 Primes of the form 5^n - n. 2
23, 15619, 244140613 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Corresponding n are given in A058046.
The next term has 254 digits.
LINKS
MATHEMATICA
Select[Table[5^n - n, {n, 400}], PrimeQ]
PROG
(Magma) [a: n in [0..400] | IsPrime(a) where a is 5^n-n];
(PARI) forstep(n=2, 1e4, 2, if(ispseudoprime(t=5^n-n), print1(t", "))) \\ Charles R Greathouse IV, Jun 08 2016
CROSSREFS
Cf. primes of the form k^n - n: A081296 (k=2), A224420 (k=3), A224451 (k=4), this sequence (k=5), A273941 (k=6), A224468 (k=7), A224469 (k=8).
Cf. A058046.
Sequence in context: A013728 A028693 A324255 * A348307 A033998 A157167
KEYWORD
nonn,bref
AUTHOR
Vincenzo Librandi, Jun 05 2016
STATUS
approved

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Last modified July 18 06:54 EDT 2024. Contains 374377 sequences. (Running on oeis4.)