OFFSET
1,2
COMMENTS
Base values b yielding a generalized Fermat prime b^(2^k) + 1 for k=16.
First square member of sequence is 3934049284 = (A253854(1))^2. - Jeppe Stig Nielsen, Jun 29 2015
LINKS
Ray Chandler, Table of n, a(n) for n = 1..1604 (2..70 from Felix Fröhlich, 71..425 from Jeppe Stig Nielsen)
C. K. Caldwell, The Prime Database, Search Output.
Y. Gallot, Generalized Fermat Prime Search
Merfighters, Table of known GF primes b^n+1 where n(exponent) is at least 8192, Mersenne Wiki
J. S. S. Nielsen, Generalized Fermat Primes sorted by base (see table at the bottom of the page)
PrimeGrid, GFN Status by n-Range, Message 89145
CROSSREFS
KEYWORD
nonn
AUTHOR
Felix Fröhlich, Dec 05 2014
EXTENSIONS
Corrected last term, and extended, by Jeppe Stig Nielsen, Jun 29 2015
New b-file, updated with data from Message 89145 at PrimeGrid forum uploaded and sequence data corrected, by Felix Fröhlich, Jan 03 2016
a(1) = 1 inserted and new b-file by Jeppe Stig Nielsen, Sep 10 2018
STATUS
approved