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I. Annouk and P. Archambault, “An Original note on Fermat numbers, on numbers of the form Wn and on numbers of the form 10k + 8 + Fn [ where Wn ∈ {22 + Fn, 2 n + Fn}, n is an integer ≥ 0, Fn is a Fermat number and k is an integer ≥ 0]”, JPRM, vol. 16, no. 4, pp. 3177-3181, Sep. 2020.