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A322916 Numbers k such that 303*2^k+1 is prime. 1
1, 2, 5, 8, 9, 10, 13, 17, 21, 30, 38, 93, 125, 140, 170, 178, 181, 394, 453, 588, 1161, 1221, 1573, 1665, 1745, 3613, 3661, 5750, 6002, 6198, 6393, 6764, 7209, 7514, 9444, 13034, 15277, 16070, 20042, 22970, 22977, 25674, 28438, 31040, 35137, 42410, 60285 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..72 (terms n = 1..68 from Robert Price)

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

MAPLE

select(n->isprime(303*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018

MATHEMATICA

Select[Range[1000], PrimeQ[303*2^# + 1] &] (* Robert Price, Dec 30 2018 *)

CROSSREFS

Cf. A002255, A050527.

Sequence in context: A068537 A047620 A283205 * A062803 A231756 A212591

Adjacent sequences:  A322913 A322914 A322915 * A322917 A322918 A322919

KEYWORD

nonn,hard

AUTHOR

Robert Price, Dec 30 2018

STATUS

approved

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Last modified June 4 01:21 EDT 2020. Contains 334808 sequences. (Running on oeis4.)