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A208178 Primes of the form 256*k + 1. 9
257, 769, 3329, 7681, 7937, 9473, 10753, 11777, 12289, 13313, 14081, 14593, 15361, 17921, 18433, 19457, 22273, 23041, 23297, 25601, 26113, 26881, 30977, 31489, 32257, 36097, 36353, 37633, 37889, 39937, 40193, 40961, 41729, 43777, 45569, 46337, 49409, 49921 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Odd primes p such that -1 is a 128th power mod p. - Eric M. Schmidt, Mar 27 2014
LINKS
FORMULA
a(n) ~ 128n log n. - Charles R Greathouse IV, Nov 01 2022
MATHEMATICA
Select[256 Range[195] + 1, PrimeQ]
PROG
(PARI) for(n=1, 195, r=256*n+1; if(isprime(r), print1(r", ")));
(Magma) [ p: p in PrimesUpTo(50000) | p mod 256 eq 1 ];
(Haskell)
a208178 n = a208178_list !! (n-1)
a208178_list = filter ((== 1) . a010051) [1, 257..]
-- Reinhard Zumkeller, Mar 06 2012
CROSSREFS
Sequence in context: A208177 A229855 A229856 * A105131 A202372 A363715
KEYWORD
nonn,easy
AUTHOR
Bruno Berselli, Feb 25 2012
STATUS
approved

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Last modified March 19 06:16 EDT 2024. Contains 370952 sequences. (Running on oeis4.)