A322948 - OEIS

A322948

Numbers k such that 313*2^k+1 is prime.

4, 10, 16, 24, 70, 184, 250, 432, 460, 792, 8482, 9868, 10954, 14098, 16260, 17770, 19354, 81504, 85672, 158662, 166354, 188914, 327924, 337942, 424318, 519748, 621432, 888288, 1949544

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..29.

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(313*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018

MATHEMATICA

Select[Range[1000], PrimeQ[313*2^# + 1] &] (* Robert Price, Dec 31 2018 *)

CROSSREFS

Cf. A002255, A050527.

Sequence in context: A341064 A366661 A271911 * A277368 A067274 A331081

Adjacent sequences: A322945 A322946 A322947 * A322949 A322950 A322951

KEYWORD

nonn,more,hard

AUTHOR

Robert Price, Dec 31 2018

STATUS

approved