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181
This number is a prime.
Just showing those entries submitted by 'Silva': (Click here to show all)
The smallest palindromic prime resulting from the sum of three consecutive emirps (37, 71, 73). [Silva]
181 equals the sum of the squares of three consecutive
composite digits: 6^2+8^2+9^2. [Silva]
The smallest palindromic prime expressed as 2n^2+2n+1. [Silva]
(There are 4 curios for this number that have not yet been approved by an editor.)
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