80818...26827 (74-digits)

This number is a prime.

                                                                        8081
8283848586 8788898108 1181281381 4815816817 8188198208 2182282382 4825826827

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+ The concatenations of, alternately, 8 with each integer from 0 through 27, is a prime. This is the first such prime of this form after 8081. Note that 0^3 = 0, 2^3 = 8, and 3^3 = 27, which are the parameters that define our curious prime. [Post]

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