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# 88888...99999 (4170-digits)

This number is a prime.

A prime made up of 8s, 9s, and the number 23704918 in the center. Note that if you type 23704918 into a calculator, then turn the calculator upside down, it (sort of) looks as if the words 'BIG HOLES' are spelled, which here refers to the holes in the digits 8 and 9 -- two numbers used to make up "Holey primes." [Earls]

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