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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A323006 Numbers k such that 363*2^k+1 is prime. 1
1, 2, 5, 16, 29, 61, 136, 145, 157, 178, 560, 581, 1001, 1234, 1325, 1370, 1405, 1541, 2761, 2984, 5441, 6386, 9769, 10756, 14144, 18385, 26233, 27496, 42422, 48865, 72473, 115372, 123262, 123836, 229264, 359725, 401653, 484076, 611998, 762961, 1319756 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Price, Table of n, a(n) for n = 1..43

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(363*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 02 2019

MATHEMATICA

Select[Range[1000], PrimeQ[363*2^# + 1] &] (* Robert Price, Jan 01 2019 *)

CROSSREFS

Sequence in context: A281980 A137997 A213359 * A139022 A196025 A174988

Adjacent sequences:  A323003 A323004 A323005 * A323007 A323008 A323009

KEYWORD

nonn,hard

AUTHOR

Robert Price, Jan 01 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 21 17:46 EDT 2019. Contains 327273 sequences. (Running on oeis4.)