This number is a prime.
Single Curio View: (Seek other curios for this number)(1+3+9)^(1+3+9) + sigma(139)^sigma(139) is prime and the largest known of this form. [Sariyar]
Submitted: 2018-12-19 13:26:57; Last Modified: 2018-12-19 14:12:56.
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