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Number Types: The Unit, Primes, and Composites:
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Note 1:
Divisibility by 1 is misleading as it never divides a number into smaller parts.

Number 1 is the only indivisible number.
Number 1 to mathematics is like a proton to chemistry.
Number 1 to mathematics is like the dna to biology.
Number 1 to mathematics is like the father to society.

Prime numbers are divisible by themselves only.
Prime numbers to mathematics are like atoms to chemistry.
Prime numbers to mathematics are like genes to biology.
Prime numbers to mathematics are like mothers to society.

Composite numbers are divisible by themselves and others (prime numbers below them).
Composite numbers to mathematics are like molecules to chemistry.
Composite numbers to mathematics are like chromosomes to biology.
Composite numbers to mathematics are like childrns to society.

Note 2:
The energy gaps between electronic shells are related to prime numbers.
[Quantum physics may offer clues to solving prime number problem: electron energy levels linked to Riemann hypothesis.]
http://www.thefreelibrary.com/Quantum+physics+may+offer+clues+to+solving+prime+number+problem:...-a0186320999

Note 3:
Why elements with last electron at shell S1 have prime atomic numbers?
http://community.discovery.com/eve/forums/a/tpc/f/1261917489/m/3941937399
See answer in this paper http://vixra.org/pdf/1101.0001v1.pdf

Note 4:
There is no need to classify numbers into evens and odds.
Divisibility by 2 is a special case of divisibility by any prime number.
If a number N is   divisible by a prime p without remainder, we say N is p-even.
If a number N is indivisible by a prime p without remainder, we say N is p-odd.

Examples:
6 is 2-even and 3-even but odd wrt to all other primes.
9 is 2-odd, 3-even
10 is 2-even, 3-odd, 5-even
etc.

It only makes us look at numbers from a narrow point of view.
Scrap all knowledge about even and odds and start seeing numbers as primes (or mothers) and composites (children) only.
This way we may progress our knowledge of inherent properties of numbers.

5)
Prime numbers are used to hide secret messages (see the movie CONTACT)
and we already have a REAL hidden message to be discovered in Al-Quran.
Al-Quran literally means "The Readable"!!! A hint to being readable despite being encrypted.

The first chapter is called “The Opener” and consists of 7 lines, 29 words, and 139 letters.
All these are prime numbers with  prime digit sums (7=7, 2+9=11, and 1+3+9=13).
And if you think this is by chance, 729139 and 139297 are both prime with prime digit sum (7+2+9+1+3+9=31).

Al-Quran consists of two parts: a Key part and a Message part.
The Key is the first chapter (The Opener) with 7 verses, 29 words and 139 letters,
while the Message consistes of the remaining 113 chapters and 6229 verses.
Again both of these numbers are primes with prime digit sums (1+1+3=5 and 6+2+2+9=19).

The number of verses per chapter gives us the abundance ratios of chemical elements in nature
and suggests that there are only 113 natural elements!

Quran and Prime Numbers: © 2009
http://www.heliwave.com
