18276...01331 (29-digits)

This number is a composite.

                                             182764125 2163435127 2910001331

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Concatenating the cubes of the first 11 natural numbers gives the pandigital composite: 18276412521634351272910001331 = 3^4 x 72901 x 89977 x 198397 x 173382730379. That's 8 = 2^3 prime factors. Note the 3^4 factor and the smaller 5-digit prime factor which is the concatenation of 729 = 3^6 and 01 = 3^0. [Post]