20071009, 05:47  #1 
"Jason Goatcher"
Mar 2005
DB1_{16} Posts 
Odd primes
Puzzle: Prove that all primes, including 2, are odd.
You have to think outside the box for this one. It is possible to prove, although mathematical purists(snobs?) won't like the proof. 
20071009, 06:20  #2 
Dec 2005
2^{2}·7^{2} Posts 
is this the same as to proof that all numbers are odd ?

20071009, 06:21  #3 
Jun 2003
7·167 Posts 

20071009, 06:53  #4  
"Jason Goatcher"
Mar 2005
5·701 Posts 
Quote:
All, primes, except 2, are odd. Out of an infinite number of primes, only 2 is even. This makes 2 a very odd prime. Therefore, all primes are odd. 

20071009, 07:04  #5 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
6,079 Posts 
So it's a play on words.
Odd = not even, and Odd = not normal All primes are odd but not necessarily odd in the same way. 
20071129, 00:00  #6 
Nov 2007
3 Posts 
putting it another way
All primes are odd but some primes are more odd than others

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Mersenne Primes p which are in a set of twin primes is finite?  carpetpool  Miscellaneous Math  3  20170810 13:47 
Distribution of Mersenne primes before and after couples of primes found  emily  Math  34  20170716 18:44 
Conjecture about Mersenne primes and nonprimes v2  Mickey1  Miscellaneous Math  1  20130530 12:32 
A conjecture about Mersenne primes and nonprimes  Unregistered  Information & Answers  0  20110131 15:41 
possible primes (real primes & poss.prime products)  troels munkner  Miscellaneous Math  4  20060602 08:35 