Googling around on contact pi ellie "base 11" I found this and this, both of which transcribe the ending, including that portion. This isn't definitive, although the fact that both of them agree in wording lends some credence towards accuracy, unless one is copying the other.
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Date: 2004-06-17 10:48 am (UTC)I also found a math in fiction page, including these spoilers on the conclusion and their relation to current number theory.