The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.



Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A291906 Numbers n such that (29^n + 1)/30 is a prime. 0


%S 7,112153,151153

%N Numbers n such that (29^n + 1)/30 is a prime.

%C Only the first term is proved to be a prime (so far). The rest correspond to probable primes.

%C a(2) from Lelio R. Paula.

%H P. Bourdelais, <a href="https://listserv.nodak.edu/cgi-bin/wa.exe?A2=NMBRTHRY;417ab0d6.0906">A Generalized Repunit Conjecture</a>, NMBRTHRY, 25 Jun 2009.

%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/prptop.php">PRP Records</a>

%K nonn,more,bref

%O 1,1

%A _Paul Bourdelais_, Sep 05 2017

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 21 16:54 EST 2020. Contains 331114 sequences. (Running on oeis4.)