99999...08321 (46-digits)

This number is a prime.

999999 9999999999 9999999999 9999999000 0843608321

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Paul Schmidt discovered that 9999999999999999999999999999999990000843608321 converts into four prime of type D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D9D0D0D0D0D8D4D3D6D0D8D3D2D1D, for D = 1, 3, 7 and 9, one at a time. [Rivera]

Submitted: 2020-07-14 10:35:05; Last Modified: 2020-07-14 12:13:35.