

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
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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^n1 (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



