2207

This number is a prime.

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If you type 2, 2, 0, 7, √, √, √, √ (i.e., repeat the square root of 2207 four times) on a calculator you'll get a good approximation of the golden ratio (phi). [Petrov]

Submitted: 2018-12-29 09:37:06; Last Modified: 2018-12-29 14:14:27.