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A081296 Primes of the form 2^k - k. 10
2, 5, 503, 8179, 524269, 2097131, 36028797018963913, 3705346855594118253554271520278013051304639509300498049262642688253220148477691 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Primes in A000325.
The corresponding k are given in A048744.
Next term a(9) contains roughly 1000 digits and is too large to include. - R. J. Mathar, Jul 15 2007
LINKS
FORMULA
a(n) = 2^A048744(n) - A048744(n). - R. J. Mathar, Jul 22 2009
MATHEMATICA
Select[Table[2^n-n, {n, 300}], PrimeQ] (* Harvey P. Dale, Nov 24 2018 *)
PROG
(PARI) { for(k=1, 100000, if(isprime(2^k-k), print1(2^k-k, ", "))); } \\ R. J. Mathar, Jul 15 2007
CROSSREFS
Cf. A048744 (k such that 2^k - k is prime).
Sequence in context: A208211 A138696 A163798 * A133378 A283561 A037063
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Apr 20 2003
EXTENSIONS
More terms from R. J. Mathar, Jul 15 2007
STATUS
approved

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Last modified March 19 03:21 EDT 2024. Contains 370952 sequences. (Running on oeis4.)