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A323039 Numbers k such that 389*2^k+1 is prime. 0
11, 57, 59, 115, 299, 347, 715, 3845, 5157, 16945, 27949, 66379, 142649, 233985, 572625, 976169, 1186577, 1824385 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

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[389*2^# + 1] &] (* Robert Price, Jan 03 2019 *)

CROSSREFS

Sequence in context: A201150 A114030 A071984 * A211614 A244497 A101094

Adjacent sequences:  A323036 A323037 A323038 * A323040 A323041 A323042

KEYWORD

nonn,more,hard

AUTHOR

Robert Price, Jan 03 2019

STATUS

approved

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Last modified September 20 21:02 EDT 2019. Contains 327247 sequences. (Running on oeis4.)