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A323005 Numbers k such that 361*2^k+1 is prime. 0
28, 36, 100, 312, 568, 2584, 9144, 37284, 96720, 105132, 147084, 222292, 280728, 292600, 1459308, 2312832, 2424232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..17.

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

MATHEMATICA

Select[Range[1000], PrimeQ[361*2^# + 1] &] (* Robert Price, Jan 01 2019 *)

CROSSREFS

Sequence in context: A048023 A105710 A192226 * A080983 A179105 A096430

Adjacent sequences:  A323002 A323003 A323004 * A323006 A323007 A323008

KEYWORD

nonn,more,hard

AUTHOR

Robert Price, Jan 01 2019

EXTENSIONS

a(16)-a(17) from Jeppe Stig Nielsen, Jan 04 2020

STATUS

approved

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Last modified May 9 19:47 EDT 2021. Contains 343746 sequences. (Running on oeis4.)