login
This site is supported by donations to The OEIS Foundation.

 

Logo

The OEIS is looking to hire part-time people to help edit core sequences, upload scanned documents, process citations, fix broken links, etc. - Neil Sloane, njasloane@gmail.com

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A243959 Numbers n such that n^524288+1 is prime. 5
75898, 341112, 356926, 475856 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Generalized Fermat primes n^(2^k)+1 for k=19.

LINKS

Table of n, a(n) for n=2..5.

C. Caldwell, The largest known primes (Primes with 600,000 or more digits)

H. Dubner and Y. Gallot, Distribution of generalized Fermat prime numbers, Math. Comp., 71 (2002), 825-832.

J. S. S. Nielsen, Generalized Fermat Primes sorted by base (See table at the bottom of the page.)

PrimeGrid, Announcement of n=75898

PrimeGrid, Announcement of n=341112

PrimeGrid, Announcement of n=356926

PrimeGrid, Announcement of n=475856

PROG

(PARI) is(n)=isprime(n^524288+1) \\ Charles R Greathouse IV, Feb 20 2017

CROSSREFS

Cf. A056993, A244150.

Sequence in context: A140940 A204865 A135209 * A236807 A251470 A091294

Adjacent sequences:  A243956 A243957 A243958 * A243960 A243961 A243962

KEYWORD

nonn,hard,more

AUTHOR

Felix Fröhlich, Jun 16 2014

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified May 28 10:09 EDT 2017. Contains 287240 sequences.