The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A294136 Sorted list of prime factors of numbers of the form 11^(2^m) + 2^(2^m) with m >= 0. 5
 5, 13, 17, 241, 257, 12289, 14657, 26113, 52321, 65537, 98561, 235009, 697409, 23068673, 558205057, 755184641, 3433910273, 5557248001, 17343447041, 65886344833, 442483095553, 689863229441, 8142833614849, 10737426890753, 11598906596353, 57966757675009 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes p other than 3 such that the multiplicative order of 11/2 (mod p) is a power of 2. LINKS Arkadiusz Wesolowski, Table of n, a(n) for n = 1..31 Anders Björn and Hans Riesel, Factors of generalized Fermat numbers, Math. Comp. 67 (1998), no. 221, pp. 441-446. Anders Björn and Hans Riesel, Table errata to “Factors of generalized Fermat numbers”, Math. Comp. 74 (2005), no. 252, p. 2099. Anders Björn and Hans Riesel, Table errata 2 to "Factors of generalized Fermat numbers", Math. Comp. 80 (2011), pp. 1865-1866. PROG (PARI) print1(5, ", "13, ", "); forprime(p=17, 57966757675009, z=znorder(Mod(11/2, p)); if(2^ispower(z)==z, print1(p, ", "))); CROSSREFS Cf. A294132, A294133, A294134, A294135. Sequence in context: A051900 A275800 A347475 * A120062 A081769 A188030 Adjacent sequences:  A294133 A294134 A294135 * A294137 A294138 A294139 KEYWORD nonn AUTHOR Arkadiusz Wesolowski, Oct 23 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 25 10:12 EST 2022. Contains 350565 sequences. (Running on oeis4.)