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# 5172337

This number is a prime.

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A prime formed from the concatenation in order of the four
prime factors of the prime-digit 72335 that is the largest
integer having the property “it and its square, 5232352225,
both use only prime digits. Found by Zak Seidov” as Rivera
notes, (see PC 72335). Also, note that 72335 consists of
all the prime digits and 5172337 contains all the prime
digits. [Loungrides]
Submitted: 2019-08-19 06:59:57; Last Modified: 2019-08-19 07:04:32.

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