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A050522
Primes of form 5*2^n-1.
5
19, 79, 1279, 5119, 20479, 81919, 1310719, 21474836479, 1407374883553279, 90071992547409919, 23611832414348226068479, 1784059615882449851322857461811868920478433279
OFFSET
1,1
LINKS
FORMULA
a(n) = 5*2^A001770(n) - 1. - Max Alekseyev, Feb 20 2024
MATHEMATICA
Select[Table[5*2^n-1, {n, 0, 150}], PrimeQ] (* Jean-François Alcover, Mar 21 2011 *)
CROSSREFS
See A001770 for more terms.
Sequence in context: A139941 A127270 A053665 * A366965 A172973 A212056
KEYWORD
nonn,nice
AUTHOR
N. J. A. Sloane, Dec 29 1999
STATUS
approved