Prime Curios!: 70000...00001 (6566-digits)

70000...00001 (6566-digits)
(another Prime Pages' Curiosity)

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A prime beginning with the digit 7, ending with the digit 1, and the rest mostly zeros except for the curious number 77345993 in the center. Note that 77345993 is a prime, and if you type it into a calculator, then turn the calculator upside down, it looks as if the word 'EGGSHELL' is spelled. [Earls]