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A125034 Primes of the form 2^n - 69. 2
59, 443, 1979, 4027, 8123, 524219, 1048507, 2097083, 8388539, 2147483579, 34359738299, 137438953403, 35184372088763, 144115188075855803, 9444732965739290427323, 19342813113834066795298747 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Corresponding n's are 7, 9, 11, 12, 13, 19, 20, 21, 23, 31, 35, 37, 45, 57, 73, 84, 89.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..33

EXAMPLE

2^7-69=59 (prime), 2^9-69=443 (prime), 2^11-69=1979(prime).

MATHEMATICA

Select[Table[2^n - 69, {n, 7, 100}], PrimeQ] (* Vincenzo Librandi, Mar 21 2013 *)

PROG

(MAGMA) [a: n in [7..100] | IsPrime(a) where a is  2^n - 69]; // Vincenzo Librandi, Mar 21 2013

CROSSREFS

Cf. A124977.

Sequence in context: A235223 A235216 A284754 * A140024 A219064 A263127

Adjacent sequences:  A125031 A125032 A125033 * A125035 A125036 A125037

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 17 2006

STATUS

approved

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Last modified March 29 05:39 EDT 2020. Contains 333105 sequences. (Running on oeis4.)