70007...89221 (30-digits)

This number is a prime.

                                            7000755497 7222633237 9814089221

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The smallest prime P formed from the concatenation of the cubes of three consecutive Honaker primes, i.e., {1913^3, 1933^3, 2141^3}. Curiously, P is also expressible as the sum of two squares: (758502607767514^2 + 353198731286095^2). [Bajpai]