This document discusses prime numbers and binary numeration. It notes that 2011 and some dates in January 2011 can be represented as prime numbers. It encourages thinking about other dates that could be written in binary and converted to prime decimal numbers.

1. H a p p y N e w P r i m e Y e a r 2 0 1 1 ! Pilar Oliva

2. About prime numbers 11 is a prime number

3. 2011 is a prime number too; it has no divisors,but...

4. 2, 3 , 5, 7, 11, 13 are the first six prime numbers

5. Try to calculate them, by using each digit of 2011 and the signs +, -, x and / once . For instance, 2 = 2 + 0x1x1

6. Now, think about counting two by two instead of ten by ten; this is the numeration system called base two. 1 is 1

7. 2 is 10