The Twentieth Fermat Number is Composite
- 1 January 1988
- journal article
- Published by JSTOR in Mathematics of Computation
- Vol. 50 (181) , 261-263
- https://doi.org/10.2307/2007929
Abstract
The twentieth Fermat number, ${F_{20}} = {2^{{2^{20}}}} + 1$, has been proven composite by machine computation.
Keywords
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