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A092131 Distance from 2^n to the next prime. 4
0, 1, 3, 1, 5, 3, 3, 1, 9, 7, 5, 3, 17, 27, 3, 1, 29, 3, 21, 7, 17, 15, 9, 43, 35, 15, 29, 3, 11, 3, 11, 15, 17, 25, 53, 31, 9, 7, 23, 15, 27, 15, 29, 7, 59, 15, 5, 21, 69, 55, 21, 21, 5, 159, 3, 81, 9, 69, 131, 33, 15, 135, 29, 13, 131, 9, 3, 33, 29, 25, 11, 15, 29, 37, 33, 15, 11, 7, 23 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Essentially the same as A013597. - T. D. Noe, Jul 17 2007

LINKS

T. D. Noe, Table of n, a(n) for n=1..5000

FORMULA

a(n)=nextprime(2^n)-2^n

EXAMPLE

a(13)=17 because 2^13=8192 and the next prime is 8209=8192+17

MATHEMATICA

Join[{0}, NextPrime[#]-#&/@(2^Range[2, 80])] (* Harvey P. Dale, Jun 06 2012 *)

PROG

(PARI) for(i=1, 100, x=2^i; print1(nextprime(x)-x, ", "))

CROSSREFS

Sequence in context: A152203 A161946 A013597 * A092099 A096567 A239626

Adjacent sequences:  A092128 A092129 A092130 * A092132 A092133 A092134

KEYWORD

easy,nonn

AUTHOR

Helmut Richter (richter(AT)lrz.de), Mar 30 2004

STATUS

approved

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Last modified November 17 10:37 EST 2019. Contains 329225 sequences. (Running on oeis4.)