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A322950 Numbers k such that 317*2^k+1 is prime. 0
7, 11, 243, 291, 327, 1211, 7331, 26775, 101603, 171071, 284795, 295195, 323871, 589755, 833467, 1047471 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

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[317*2^# + 1] &] (* Robert Price, Dec 31 2018 *)

CROSSREFS

Cf. A002255,A050527.

Sequence in context: A292791 A106818 A231329 * A201120 A164328 A301736

Adjacent sequences:  A322947 A322948 A322949 * A322951 A322952 A322953

KEYWORD

nonn,more,hard

AUTHOR

Robert Price, Dec 31 2018

STATUS

approved

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Last modified August 22 12:10 EDT 2019. Contains 326177 sequences. (Running on oeis4.)