0.6867778344606349544...

This number is neither prime nor composite.

0 .686777834 4606349544 2654022370
6769269227 0026376225 0420739342 5294011531 0087700437 3669695301 0676825901

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The zero of the power series P(x) whose coefficient of x^n is equal to the nth prime, i.e., P(x) = 1 - 2x + 3x² - 5x³ + 7x⁴ - 11x⁵ + 13x⁶ - .... [Post]

Submitted: 2005-03-31 19:52:23; Last Modified: 2008-02-06 17:44:26.