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A268660 Numbers n such that 3*2^n + 1 is a prime factor of a generalized Fermat number 12^(2^m) + 1 for some m. 10
2, 5, 8, 41, 209, 353, 2816, 20909, 42665, 157169, 213321, 303093, 362765, 382449, 2145353, 2478785 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
REFERENCES
Wilfrid Keller, private communication, 2008.
LINKS
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.
C. K. Caldwell, Top Twenty page, Generalized Fermat Divisors (base=12)
CROSSREFS
Sequence in context: A120342 A214842 A299517 * A180627 A264860 A061354
KEYWORD
nonn,hard,more
AUTHOR
STATUS
approved

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Last modified June 17 23:09 EDT 2024. Contains 373468 sequences. (Running on oeis4.)