22523...32335 (31-digits)

This number is a composite.

                                          2 2523337725 2752252535 3525332335

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The smallest 31-digit prime-digit semiprime k containing all of the prime digits {2, 3, 5, 7} found in the first 1171 prime digits (in order of their occurrence) in the decimal expansion of π, such that sod(k) is prime. [Bajpai]