305175781

This number is a prime.

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5^12+5^11+5^10+5^9+5^8+5^7+5^6+5^5+5^4+5^3+5^2+5+1 is prime; the repunit 1111111111111 is prime in both binary (base 2) and quinternary (base 5) notation. [Dobb]

Submitted: 2003-02-09 23:52:04; Last Modified: 2008-01-30 17:28:00.