login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064525 Smallest Fibonacci number with a prime number of decimal digits. 0

%I #7 Dec 16 2018 17:00:45

%S 13,144,10946,1346269,12586269025,1548008755920,14472334024676221,

%T 1100087778366101931,10284720757613717413913,

%U 11825896447871834976429068427,1454489111232772683678306641953

%N Smallest Fibonacci number with a prime number of decimal digits.

%e 13 is the first Fibonacci with 2 decimal digits. 144 is the first Fibonacci with 3 decimal digits, etc.

%t Module[{nn=500,fibs},fibs=Fibonacci[Range[nn]];Table[SelectFirst[fibs, IntegerLength[ #]==n&],{n,Prime[Range[11]]}]] (* _Harvey P. Dale_, Dec 16 2018 *)

%K base,easy,nonn

%O 1,1

%A _Jason Earls_, Oct 07 2001

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 17 22:17 EDT 2024. Contains 374377 sequences. (Running on oeis4.)