Happy prime year!
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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.
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2) A composite number has more than two factors. For example, 8 has four factors: 1, 2, 4, and 8.
3) One is neither a prime nor composite number. It only has one factor, which is itself.
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Happy prime year!
- 1. H a p p y N e w P r i m e Y e a r 2 0 1 1 ! Pilar Oliva
- 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
- 7. 2 is 10
- 8. 3 is 11
- 10. Because 4 = 1x2 2 + 0x2 1 + 0x1
- 11. Then think about the first day of the year.
- 12. 01/01/11
- 13. It is 010111 in base 2;what is its value in the decimal numeration system ?
- 14. 0x2 5 +1x2 4 +0x2 3 +1x2 2 +1x2 1 +1x1=23
- 15. 23 is also a prime number!
- 19. 55 is not a prime number, because it is a multiple of 5 and 11.