This number is a composite.

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The only 2-sphenic number that can be represented as sum of powers using all the prime digits as bases and exponents, i.e., 2^2+3^3+5^7+7^5=94963 = 11 × 89 × 97. Note that a concatenation of its prime factors, i.e., 899711 is prime. [Loungrides]

Submitted: 2020-02-27 03:46:00;   Last Modified: 2020-02-27 08:37:36.
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