The On-Line Encyclopedia of Integer Sequences (OEIS)

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A032394

Numbers k such that 89*2^k+1 is prime.
(history; published version)

#26 by Bruno Berselli at Thu Sep 19 03:40:07 EDT 2019

STATUS

editing

approved

#25 by Bruno Berselli at Thu Sep 19 03:40:03 EDT 2019

NAME

Numbers n k such that 89*2^nk+1 is prime.

STATUS

approved

editing

#24 by N. J. A. Sloane at Thu Dec 20 14:03:03 EST 2018

LINKS

Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.com/rieselriesel1.html">List of primes k.2^n + 1 for k < 300</a>

Discussion

Thu Dec 20

14:03

OEIS Server: https://oeis.org/edit/global/2778

#23 by N. J. A. Sloane at Thu Dec 13 17:03:42 EST 2018

LINKS

Ray Ballinger and Wilfrid Keller, <a href="http://web.archive.org/web/20161028080239/http://www.prothsearch.netcom/riesel.html">List of primes k.2^n + 1 for k < 300</a>

Discussion

Thu Dec 13

17:03

OEIS Server: https://oeis.org/edit/global/2777

#22 by N. J. A. Sloane at Wed Dec 12 07:58:05 EST 2018

LINKS

Wilfrid Keller, <a href="http://web.archive.org/web/20161028021640/http://www.prothsearch.netcom/riesel2.html">List of primes k.2^n - 1 for k < 300</a>

Discussion

Wed Dec 12

07:58

OEIS Server: https://oeis.org/edit/global/2776

#21 by N. J. A. Sloane at Wed Dec 12 07:49:59 EST 2018

LINKS

Ray Ballinger, <a href="http://web.archive.org/web/20160604135248/http://www.prothsearch.netcom/index.html">Proth Search Page</a>

Discussion

Wed Dec 12

07:49

OEIS Server: https://oeis.org/edit/global/2775

#20 by Charles R Greathouse IV at Tue Jun 13 10:42:32 EDT 2017

STATUS

editing

approved

#19 by Charles R Greathouse IV at Tue Jun 13 10:41:34 EDT 2017

PROG

(PARI) is(n)=ispseudoprime(89*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

STATUS

approved

editing

#18 by N. J. A. Sloane at Thu Mar 02 11:43:35 EST 2017

LINKS

Ray Ballinger, <a href="http://web.archive.org/web/20160604135248/http://www.prothsearch.net/index.html">Proth Search Page</a>

Discussion

Thu Mar 02

11:43

OEIS Server: https://oeis.org/edit/global/2611

#17 by N. J. A. Sloane at Thu Mar 02 11:38:03 EST 2017

LINKS

Ray Ballinger and Wilfrid Keller, <a href="http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html">List of primes k.2^n + 1 for k < 300</a>

EXTENSIONS

More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013

Discussion

Thu Mar 02

11:38

OEIS Server: https://oeis.org/edit/global/2607