Toscead betweox fadungum "Fermat tæl"
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Líne 18:
Ȝif 2<sup>''n''</sup> + 1 [[frumtæl]] is, man cynþ ācȳðan þæt ''n'' must bēon 2-miht. (Ȝif ''n'' = ''ab'' þæt 1 < ''a'', ''b'' < ''n'' and ''b'' is ofertæl, man hæfþ 2<sup>''n''</sup> + 1 ≡ (2<sup>''a''</sup>)<sup>''b''</sup> + 1 ≡ (−1)<sup>''b''</sup> + 1 ≡ 0 ('''mod''' 2<sup>''a''</sup> + 1).)
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== Basic properties ==
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