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A135118 Integers k such that 10^k + 51 is a prime number. 1

%I #18 Jan 25 2022 08:36:30

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

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

%C If more terms exist, then they are > 39456. - _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="https://stdkmd.net/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 term because 10^3 + 51 = 1000 + 51 = 1051, which is prime.

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

%K nonn,more

%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) from _Robert Price_, Dec 27 2010

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)