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A320338
Numbers k such that 481*2^k+1 is prime.
0
64, 196, 2164, 2956, 110748, 1263444, 1593660, 2201148
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..8.
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[481*2^# + 1] &]
CROSSREFS
Sequence in context:
A175166
A220763
A030028
*
A250135
A273321
A091077
Adjacent sequences:
A320335
A320336
A320337
*
A320339
A320340
A320341
KEYWORD
nonn
,
more
,
hard
AUTHOR
Robert Price
, Jan 07 2019
EXTENSIONS
a(8) from
Jeppe Stig Nielsen
, Feb 25 2020
STATUS
approved
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Last modified September 8 00:04 EDT 2024. Contains 375749 sequences. (Running on oeis4.)