A322998 Numbers k such that 385*2^k+1 is prime.

8, 10, 14, 16, 36, 62, 76, 88, 114, 138, 258, 278, 338, 416, 538, 590, 736, 1074, 1154, 1262, 1768, 2602, 2820, 3436, 3702, 3970, 4778, 5990, 7598, 8088, 9398, 9628, 13036, 14954, 15112, 16334, 16636, 17958, 22994, 23054, 25130, 30660, 35358, 64560, 78770

Offset

1,1

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..62 (terms n = 1..60 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(k->isprime(385*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 03 2019

Mathematica

Select[Range[1000], PrimeQ[385*2^# + 1] &]

Crossrefs

Sequence in context: A163628 A060864 A087695 * A368280 A262708 A134321

Adjacent sequences: A322995 A322996 A322997 * A322999 A323000 A323001

Keyword

nonn,hard

Author

Robert Price, Jan 03 2019

Status

approved