2020

This number is a composite.

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For three composite years y-1, y, and y+1 the prime factorization of y has no digits in common with the prime factorizations of y-1 or y+1 for y=2020. The last three years with this property were 1815, 1935, and 2019. The next three such years will be 2045, 2049, and 2065. [Gaydos]

Submitted: 2020-01-04 00:01:17;   Last Modified: 2020-01-04 19:06:15.
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