11011...21561 (35-digits)

This number is a prime.

11011 2245101426 4278132249 4458421561

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After 11, the smallest prime concatenated from the number of series-reduced trees with n nodes, specifically through n = 19 (itself a prime). [Post]

Submitted: 2010-01-10 00:26:46; Last Modified: 2010-01-10 00:46:47.