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This number is a prime.
Single Curio View: (Seek other curios for this number)The smallest "plus sign prime."
1 3 1 3 3 3 1 3 1A plus sign prime is a palindromic prime of n^2 digits (n, odd > 2) arranged left-right, top-down, in an n-by-n array, where the central row and column make a plus sign (+) and consist of identical digits b. The other digits of the array are identical digits different from b. Thus, an order 3 plus sign prime is of the form ababbbaba, order 5 of the form aabaaaabaabbbbbaabaaaabaa, etc. [Loungrides]
Submitted: 2009-08-04 14:57:18; Last Modified: 2009-08-24 22:45:56.
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