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A309413 Numbers k such that (50^k + 1)/51 is prime. 0

%I #10 Jul 31 2019 09:08:29

%S 1153,26903,56597

%N Numbers k such that (50^k + 1)/51 is prime.

%H P. Bourdelais, <a href="https://listserv.nodak.edu/cgi-bin/wa.exe?A2=NMBRTHRY;417ab0d6.0906">A Generalized Repunit Conjecture</a>

%t Do[p=Prime[n]; If[PrimeQ[(50^p + 1)/51], Print[p]], {n, 1, 1000000}]

%o (PARI) is(n)=ispseudoprime((50^n+1)/51)

%K nonn,bref,more

%O 1,1

%A _Paul Bourdelais_, Jul 29 2019

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)