Prime Decomposition of 7th Fermat Number/Mistake

Source Work

1986: David Wells: Curious and Interesting Numbers:

The Dictionary
$257$


1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary
$257$


Mistake

Thus, in $1909$, Moorhead and Western proved that $F_7$ and $F_8$ are composite, without producing any factors.


Correction

It is not Moorhead, but James Caddall Morehead.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $257$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $257$
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