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 A178835 Primes of the form 19 * 2^n - 1. 1
 37, 151, 607, 39845887, 41781441855487, 10696049115004927, 11760430373211112611541680127, 206891679087930585785731761318515072565247, 52964269846510229961147330897539858576703487, 888592995497188974267840378291500075950806986129407 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Main entry for this sequence is A001775. Also primes of the form 38 * 4^n - 1, since even-numbered exponents yield numbers divisible by three. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..20 MATHEMATICA Select[19*2^Range[140]-1, PrimeQ] (* Harvey P. Dale, Mar 07 2014 *) PROG (MAGMA) [a: n in [0..250] | IsPrime(a) where a is (19 * 2^n - 1)]; // Vincenzo Librandi, Mar 08 2014 CROSSREFS Sequence in context: A096700 A158596 A142688 * A250942 A250943 A142197 Adjacent sequences:  A178832 A178833 A178834 * A178836 A178837 A178838 KEYWORD nonn AUTHOR Kevin Batista (kevin762401(AT)yahoo.com), Jun 16 2010 EXTENSIONS Edited by Charles R Greathouse IV, Aug 29 2010 Edited by Charles R Greathouse IV, Sep 02 2010 More terms from Harvey P. Dale, Mar 07 2014 STATUS approved

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Last modified May 20 20:15 EDT 2022. Contains 353876 sequences. (Running on oeis4.)