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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