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: 2019-12-22 00:47:55; Last Modified: 2019-12-22 01:03:55.
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