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A318193 Numbers k such that 465*2^k+1 is prime. 1
2, 6, 9, 21, 41, 50, 74, 105, 119, 161, 191, 246, 255, 402, 419, 540, 941, 1085, 1245, 1250, 1415, 1992, 2169, 2243, 2640, 4908, 5102, 6410, 9078, 13215, 15609, 16239, 19059, 25070, 27326, 30455, 30681, 44255, 64833, 81269, 112710, 119001, 187589, 201468 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..58

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[465*2^# + 1] &]

CROSSREFS

Sequence in context: A095967 A316429 A047161 * A048083 A127931 A077237

Adjacent sequences:  A318190 A318191 A318192 * A318194 A318195 A318196

KEYWORD

nonn,hard

AUTHOR

Robert Price, Jan 07 2019

STATUS

approved

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Last modified October 17 14:20 EDT 2019. Contains 328113 sequences. (Running on oeis4.)