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A322955 Numbers k such that 325*2^k+1 is prime. 0
2, 14, 18, 32, 42, 72, 144, 174, 282, 318, 828, 1338, 2154, 2750, 4034, 9858, 13692, 49052, 63522, 86784, 117162, 126014, 273090, 302574, 413862, 901902 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

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(325*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018

MATHEMATICA

Select[Range[1000], PrimeQ[325*2^# + 1] &] (* Robert Price, Dec 31 2018 *)

CROSSREFS

Cf. A002255, A050527.

Sequence in context: A096508 A108029 A212048 * A266388 A032476 A274062

Adjacent sequences:  A322952 A322953 A322954 * A322956 A322957 A322958

KEYWORD

nonn,more,hard

AUTHOR

Robert Price, Dec 31 2018

STATUS

approved

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Last modified June 18 12:21 EDT 2021. Contains 345104 sequences. (Running on oeis4.)