105

This number is a composite.

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ The only 3-digit number n whereby subtracting from it each of the first eight powers 2^n, (n=1 to 8), then taking the absolute values of the results, produce prime numbers, i.e., 105-2^1 = 103, 105-2^2 = 101, 105-2^3 = 97, 105-2^4 = 89, 105-2^5 = 73, 105-2^6 = 41, |105-2^7|= 23, |105-2^8| = 151. [Loungrides]

(There is one curio for this number that has not yet been approved by an editor.)

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