A323039 Numbers k such that 389*2^k+1 is prime.

11, 57, 59, 115, 299, 347, 715, 3845, 5157, 16945, 27949, 66379, 142649, 233985, 572625, 976169, 1186577, 1824385

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