Friday, November 11, 2011

11/11/11 – a date with a special meaning?

Dates such as 11/11/11, are happening more often since the start of the new millennium.

The hype for these special dates is building across popular culture, with films and stories being made about the end of the world and news reports about expectant parents eagerly waiting for their children to be born on these dates.

But is there a special meaning behind these unique dates? Or is it just pure math?

Significance of 11/11/11

Based on past calendar dates such as 10/10/10, or October 10, 2010, no significant or unusual phenomenon occurs simply because of a date that has the same numbers in a sequence.

The numerical sequence of November 11 holds a special significance in the binary numeral system, which is the base-2 number system that represents numeric values using two symbols, 0 and 1. The date of November 11 has a binary number of 111110 where it has a decimal equivalent of 62 in the year 2010, and a binary number of 111111 with a decimal equivalent of 63 in the year 2011.

The number eleven has a special characteristic in mathematics where it is the sixth prime number. It contains some interesting peculiarities where the number eleven times itself equals a palindrome:

(2 digits) 11 x 11 = 121
(6 digits) 111111 x 111111 = 12345654321
(9 digits) 111111111 x 111111111 = 12345678987654321


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