405071179

This number is a prime.

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The largest prime that is the sum of powers using each of the digits twice (as bases and exponents), i.e., 9^9+8^8+7^7+6^6+5^5+4^3+3^4+2^2+1^0+0^1. [Loungrides]

Submitted: 2014-12-09 16:18:47; Last Modified: 2019-01-04 14:53:31.