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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A323028 Numbers k such that 375*2^k+1 is prime. 1
1, 3, 6, 8, 10, 13, 14, 16, 17, 21, 22, 26, 30, 32, 33, 39, 49, 53, 152, 162, 181, 233, 328, 576, 629, 666, 824, 850, 919, 1131, 1738, 1782, 1957, 1983, 2601, 2643, 2729, 2784, 2817, 2973, 3226, 3478, 3759, 5479, 6642, 10889, 12869, 15926, 16718, 18022 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..83 (terms n = 1..81 from Robert Price)

Ray Ballinger, Proth Search Page

Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for 300 < k < 600

Y. Gallot, Proth.exe: Windows Program for Finding Large Primes

Wilfrid Keller, List of primes k.2^n - 1 for k < 300

Eric Weisstein's World of Mathematics, Proth Prime

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

MAPLE

select(k->isprime(375*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 02 2019

MATHEMATICA

Select[Range[1000], PrimeQ[375*2^# + 1] &] (* Robert Price, Jan 02 2019 *)

CROSSREFS

Sequence in context: A180398 A128420 A099135 * A189471 A169863 A304500

Adjacent sequences:  A323025 A323026 A323027 * A323029 A323030 A323031

KEYWORD

nonn,hard

AUTHOR

Robert Price, Jan 02 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)