This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A135118 Integers n such that 10^n+51 is a prime number. 1

%I

%S 1,2,3,13,19,81,658,1009,1070,1731,2899,4237,5499,18628,28699,47026

%N Integers n such that 10^n+51 is a prime number.

%C If more terms exist, then they are >39456. [From _Robert Price_, Aug 14 2010]

%C See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10051".

%H Makoto Kamada, <a href="http://stdkmd.com/nrr/prime/">List of near-repdigit-related prime numbers</a>.

%H <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>.

%e 3 is a member because 10^3+51 = 1000+51 = 1051, which is prime.

%Y Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.

%K more,nonn

%O 1,2

%A Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008

%E a(8)-a(15) from _Robert Price_, Aug 14 2010

%E Edited by _Ray Chandler_, Dec 23 2010

%E a(16)=47026 from _Robert Price_, Dec 27 2010

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

Last modified October 15 17:12 EDT 2018. Contains 316237 sequences. (Running on oeis4.)