    Sentence 1:..To what extent did|  Ferniat. confirm the validity off  Fermat numbers?    Sentence 2:.. Fermat. also  conjectured that all numbers off  the form 22n' + 1 are prime|  (they are-. “called. Fermat|  jnumbers) ‘and he verified this|  jup ton = £ (or 216 +. 1).         