# How to prove that all odd numbers are prime?

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#### mediator

##### Technomancer
I found this and thought to share

How to prove that all odd numbers are prime ?

Well, this problem has different solutions whether you are a:

Mathematician:
3 is prime, 5 is prime, 7 is prime, and by induction we have that all the odd integers are prime.

Physicist:
3 is prime, 5 is prime, 7 is prime, 9 is an experimental error...

Engineer:
3 is prime, 5 is prime, 7 is prime, 9 is prime...

Chemist:
3 is prime, 5 is prime... hey, let's publish!

Modern physicist using renormalization:
3 is prime, 5 is prime, 7 is prime, 9 is ... 9/3 is prime, 11 is prime, 13 is prime, 15 is ... 15/3 is prime, 17 is prime, 19 is prime, 21 is ... 21/3 is prime...

Quantum Physicist:
All numbers are equally prime and non-prime until observed.

Professor:
3 is prime, 5 is prime, 7 is prime, and the rest are left as an exercise for the student.

Let p be any prime number larger than 2. Then p is not divisible by 2, so p is odd. QED

Measure nontheorist:
There are exactly as many odd numbers as primes (Euclid, Cantor), and exactly one even prime (namely 2), so there must be exactly one odd nonprime (namely 1).

Cosmologist:
3 is prime, yes it is true....

Computer Scientist:
10 is prime, 11 is prime, 101 is prime...

Programmer:
3 is prime, 5 is prime, 7 is prime, 9 will be fixed in the next release, ...

C programmer:
03 is prime, 05 is prime, 07 is prime, 09 is really 011 which everyone knows is prime, ...

BASIC programmer:
What's a prime? From the excellent XKCD webcomic.

COBOL programmer:
What's an odd number?

Windows programmer:
3 is prime. Wait...

Mac programmer:
Now why would anyone want to know about that? That's not user friendly. You don't worry about it, we'll take care of it for you.

Bill Gates:
1. No one will ever need any more than 3.

ZX-81 Computer Programmer:
3 is prime, Out of Memory.

Pentium owner:
3 is prime, 5 is prime, 7 is prime, 8.9999978 is prime...

GNU programmer:
% prime
usage: prime [-nV] [--quiet] [--silent] [--version] [-e script] --catenate --concatenate | c --create | d --diff --compare | r --append | t --list | u --update | x -extract --get [ --atime-preserve ] [ -b, --block-size N ] [ -B, --read-full-blocks ] [ -C, --directory DIR ] [--checkpoint ] [ -f, --file [HOSTNAME:]F ] [ --force-local ] [ -F, --info-script F --new-volume-script F ] [-G, --incremental ] [ -g, --listed-incremental F ] [ -h, --dereference ] [ -i, --ignore-zeros ] [ --ignore-failed-read ] [ -k, --keep-old-files ] [ -K, --starting-file F ] [ -l, --one-file-system ] [ -L, --tape-length N ] [ -m, --modification-time ] [ -M, --multi-volume ] [ -N, --after-date DATE, --newer DATE ] [ -o, --old-archive, --portability ] [ -O, --to-stdout ] [ -p, --same-permissions, --preserve-permissions ] [ -P, --absolute-paths ] [ --preserve ] [ -R, --record-number ] [ [-f script-file] [--expression=script] [--file=script-file] [file...]
prime: you must specify exactly one of the r, c, t, x, or d options

Unix programmer:
3 is prime, 5 is prime, 7 is prime, ...
Segmentation fault, Core dumped.

Computer programmer:
3 is prime, 5 is prime, 7 is prime, 9 is prime, 9 is prime, 9 is prime, 9 is ...
Oops, let's try that again:
3 is prime, 5 is prime, 7 is prime, 9 is ... 3 is prime, 5 is prime, 7 is prime, 9 is ... 3 is ...
3 is not prime, 5 is not prime, 7 is not prime, 9 is not prime...
So much for the beta releases. Ship this:
3 is prime, 5 is prime, 7 is prime, 9 is a feature, 11 is prime...
and put on the cover "More prime numbers than anyone else in the industry !"
Coming soon:
3 is a prime, 4 is a feature, 5 is a prime, 6 is a feature, 7 is a prime, 8 is not yet implemented, 9 is our backwards compatibility module, ...

Computational linguist:
3 is an odd prime, 5 is an odd prime, 7 is an odd prime, 9 is a very odd prime, ...

Software tech support operator:
Well, we haven't had any reports of composite odd numbers... do you have the latest version of ZFC?

1 is green, 2 is blue, 3 is orange, 4 is red...

Logician:
Hypothesis: All odd numbers are prime
Proof:

1. If a proof exists, then the hypothesis must be true
2. The proof exists; you're reading it now.

From 1 and 2 follows that all odd numbers are prime

Linguist:
3 is prime, 5 is prime, 7 is prime, 9 aaah. I can make 9 a prime.

Philosopher:
Why don't we just call all the odd numbers prime and call all the prime numbers odd, that way all the odd numbers would be prime

Philosopher (2):
3 is prime. Hum, that's an interesting statement, I'll get one of my research students to look into that.

Economist:
Assume 9 is prime...

Economist (2):
2 is a prime, 4 is a prime.

Economist (3):
2 is even, 4 is even, 6 is even...

Economist (4):
3 is prime, 5 is prime, 7 is prime, 9 is not prime. Look, the prime rate is dropping.

Statistician:
100% of the sample 5, 13, 37, 41 and 53 is prime, so all odd numbers must be prime.

Mechanical Statistician:
3 is prime, 5 is prime, 7 is prime, 9 is an outlier, 11 is prime, 13 is prime...

English major:
What's a prime number ?

Politician:
What's a number ?

Politician (2):
It depends on what the meaning of is is.

Philosophy major:
What is ?

Athletic scholarship:
What !?

Mid-level manager:
3 is prime, 5 is prime, 7 is prime, 9 is... Who can I delegate this to ?

Lawyer:
3 is prime, 5 is prime, 7 is prime, although there appears to be prima facie evidence that 9 is not prime, there exists substantial precedent to indicate that nine should be considered prime. The following brief presents the case for nine's primeness ...
Salesman:
3 is prime, 5 is prime, 7 is prime, and with 9 you get five excellent primes for the price of three !

Anthropologist:
Prime or not, every number is unique. Take 9 for example...

Liberal:
The fact that nine is not prime indicates a deprived cultural environment which can only be remedied by a federally funded cultural enrichment program.

Bush:
What's nine got against being prime? I'll bet it won't allow the pledge of allegiance to be said in our schools either.

Nixon:
Put nine on the enemies list. I'm gonna get that number.

New Yorker:
3 is prime, 5 is prime, 7 is prime, 9 is ... NONE OF YOUR DAMN BUSINESS!
rec.humor poster:
3 is prime, 3 is prime, 3 is prime, 3 is prime

"You know what seems odd to me ? Numbers that aren't divisible by two." — Michael Wolf.

"I don't get even, I get odder."

Source : Nuthing goes peacefully without the source!

#### The_Devil_Himself

##### die blizzard die! D3?
LMAO.nice!

"No one will ever need any more than 3." and
"What's nine got against being prime? I'll bet it won't allow the pledge of allegiance to be said in our schools either."

are really funny.

#### gxsaurav

##### You gave been GXified
Mac programmer:
Now why would anyone want to know about that? That's not user friendly. You don't worry about it, we'll take care of it for you.

GNU programmer:
% prime
usage: prime [-nV] [--quiet] [--silent] [--version] [-e script] --catenate --concatenate | c --create | d --diff --compare | r --append | t --list | u --update | x -extract --get [ --atime-preserve ] [ -b, --block-size N ] [ -B, --read-full-blocks ] [ -C, --directory DIR ] [--checkpoint ] [ -f, --file [HOSTNAME:]F ] [ --force-local ] [ -F, --info-script F --new-volume-script F ] [-G, --incremental ] [ -g, --listed-incremental F ] [ -h, --dereference ] [ -i, --ignore-zeros ] [ --ignore-failed-read ] [ -k, --keep-old-files ] [ -K, --starting-file F ] [ -l, --one-file-system ] [ -L, --tape-length N ] [ -m, --modification-time ] [ -M, --multi-volume ] [ -N, --after-date DATE, --newer DATE ] [ -o, --old-archive, --portability ] [ -O, --to-stdout ] [ -p, --same-permissions, --preserve-permissions ] [ -P, --absolute-paths ] [ --preserve ] [ -R, --record-number ] [ [-f script-file] [--expression=script] [--file=script-file] [file...]
prime: you must specify exactly one of the r, c, t, x, or d options

Unix programmer:
3 is prime, 5 is prime, 7 is prime, ...
Segmentation fault, Core dumped.

Lolz....

awesome..

#### fun2sh

##### Pawned!... Beyond GODLIKE
hey i died laughin n my ghost is still

ROFL!!!

Nice find

#### ~Phenom~

##### The No.1 Stupid
Haha, Really Funny. )

OP

LOL!

Staff member
lol

hahahaha!!

really funny!

amazing.........

Awesome

#### piyush gupta

##### Cyborg Agent
Windows programmer:
3 is prime. Wait...

Really very very nice finding dude...

truly funny.

#### casanova

##### The Frozen Nova
Cool.

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