OFFSET
1,1
COMMENTS
The Golden ratio is (1+sqrt(5))/2 = 1.618033988749894848204586834....
MAPLE
Digits := 10000: p0 := evalf((1+sqrt(5))/2):for d from 1 to 20 do: id:=0:for
i from 0 to 50000 while(id=0) do :q0:=trunc(p0*10^(i+d-1)): x:= irem(q0, 10^d):
if type(x, prime)=true and length(x)=d then printf(`%d, `, x):id:=1: else fi:od:od:
MATHEMATICA
With[{c=RealDigits[GoldenRatio, 10, 100000][[1]]}, FromDigits/@Table[ SelectFirst[ Partition[c, n, 1], PrimeQ[FromDigits[#]] && IntegerLength[ FromDigits[#]]==n&], {n, 18}]] (* Harvey P. Dale, Aug 21 2017 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Michel Lagneau, Feb 15 2011
STATUS
approved