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A135113 Integers k such that 10^k + 67 is a prime number. 1

%I #21 Jan 25 2022 08:46:59

%S 2,4,14,26,36,60,150,410,484,972,1942,3694,6926,8582,11930,16076,

%T 16276,22820

%N Integers k such that 10^k + 67 is a prime number.

%C The next k, if it exists, is > 100000. - _Robert Price_, Apr 25 2011

%C See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10067".

%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 4 is a term: 10^4 + 67 = 10000 + 67 = 10067, which is a prime number.

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

%K nonn,more

%O 1,1

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

%E Term 11930 from _Robert Price_, Mar 22 2010

%E Terms 1942, 3694, 6926, 8582, 16076, 16276, 22820 from _Robert Price_, Sep 04 2010

%E Edited by _Ray Chandler_, Dec 23 2010

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)