The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A244150 Numbers b such that b^262144+1 is prime. 23
 1, 24518, 40734, 145310, 361658, 525094, 676754, 773620, 1415198, 1488256, 1615588, 1828858, 2042774, 2514168, 2611294, 2676404, 3060772, 3547726, 3596074, 3673932, 3853792, 3933508, 4246258, 4489246, 5152128, 5205422, 5828034, 6287774, 6291332, 8521794 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Base values b yielding a generalized Fermat prime b^(2^k)+1 for k=18. LINKS Jeppe Stig Nielsen, Table of n, a(n) for n = 1..53 C. Caldwell, The Prime Pages Database Search Output H. Dubner and Y. Gallot, Distribution of generalized Fermat prime numbers, Math. Comp., 71 (2002), 825-832. M. Goetz, GFN Prime Discoveries, PrimeGrid forum. J. S. S. Nielsen, Generalized Fermat Primes sorted by base (See table at the bottom of the page.) PrimeGrid, Announcement of b=40734 PrimeGrid, Announcement of b=145310 PrimeGrid, Announcement of b=361658 PrimeGrid, Announcement of b=525094 PrimeGrid, Announcement of b=676754 PrimeGrid, Announcement of b=773620 PrimeGrid, Announcement of b=1415198 PrimeGrid, Announcement of b=1488256 PrimeGrid, Announcement of b=1615588 PrimeGrid, Announcement of b=1828858 PrimeGrid, Announcement of b=2042774 PrimePages, 1488256^262144 + 1 PrimePages, 1615588^262144 + 1 CROSSREFS Cf. A056993, A005574, A000068, A006314, A006313, A006315, A006316, A056994, A056995, A057465, A057002, A088361, A088362, A226528, A226529, A226530, A251597, A253854, A243959, A321323. Sequence in context: A237207 A224423 A258441 * A229798 A195655 A203983 Adjacent sequences:  A244147 A244148 A244149 * A244151 A244152 A244153 KEYWORD nonn,hard AUTHOR Felix Fröhlich, Jun 21 2014 EXTENSIONS a(9), announced in message 92163 in PrimeGrid forum, added by Felix Fröhlich, Feb 17 2016 a(10), a(11) sent by Maximilian Pacher, Jun 27 2016, and a(12) on Aug 24 2016. - N. J. A. Sloane a(13) from Felix Fröhlich, Nov 27 2016 a(14)-a(17) from Jeppe Stig Nielsen, Sep 06 2017 a(1) = 1 inserted by and more terms from Jeppe Stig Nielsen, Sep 10 2018 a(27)-a(30) from Jeppe Stig Nielsen, Sep 21 2019 STATUS approved

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

Last modified July 3 18:09 EDT 2022. Contains 355055 sequences. (Running on oeis4.)