3491

This number is a prime.

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π/9 ≈ 0.3491; notice that 9 is the "intruder" in the number 3491 when looking for the first three decimal digits of π: 3–1–4. [Leonardis]

Submitted: 2019-12-21 18:47:55;   Last Modified: 2019-12-21 19:03:55.
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