61

This number is a prime.

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The sum of the lowest digit in each of the powers of two (2 + 4 + 8 + 1 + 2 + 4 + 1 + 2 + 1 + 0 + 0 + 0 + 1 + 1 + 2 + 3 + 0 ...) is 61 unless there are some large power of two that has no zero. [Gaydos]

Submitted: 2018-05-27 02:53:42;   Last Modified: 2018-05-27 07:12:09.
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