A062637 Numbers k such that 71^k - 70^k is prime.
47, 139, 227, 2339, 4919, 21319
Offset: 1
Programs
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PARI
is(n)=ispseudoprime(71^n-70^n) \\ Charles R Greathouse IV, Jun 13 2017
Extensions
a(6) from Robert Price, Feb 17 2014
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
is(n)=ispseudoprime(71^n-70^n) \\ Charles R Greathouse IV, Jun 13 2017
Comments