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{{Infobox
 
|title = 71
 
|image = 71.png
 
|imagewidth = 200
 
|roman-number = LXXI
 
|ordinal-number = seventy first|previous = [[67|<font color="white">67</font>]]
 
|next = [[73|<font color="white">73</font>]]}}
 
71 is a [http://prime-numbers.wikia.com/wiki/1-100 prime number from 1-100]. 71 has 2 factors, 1 and 71. It is the twentieth prime number, and the twentieth prime number from 1-100.
 
==Proofs==
 
*1 can divide 71
 
*2 cannot
 
*3 cannot
 
*4 - 70 cannot
 
*71 can!
 
==Relationship with other odd numbers==
 
===The numbers before===
 
*The previous odd number, 69, is not a prime number. It is divisible by 3.
 
*The odd number previous to 69 is 67. 67 is a prime number.
 
**67 and 71 are four numbers apart; therefore, they are cousin primes.
 
*The odd number previous to 67 is 65. 65 is not a prime number. It is divisible by 5.
 
===The numbers after===
 
*The next odd number, 73, is a prime number.
 
**There are no odd numbers between 71 and 73. As a result, they are twin primes.
 
*75, the odd number following 73, is not a prime number. It is divisible by 5.
 
*77, the odd number following 75, is also not a prime number. It is divisible by 7.
 
*79 is the next prime number after 73.
 
   
{{Navbox_primes}}
 
 
[[Category:Prime Numbers]]
 
[[Category:Prime Numbers]]
 
[[Category:Prime numbers from 1-100]]
 
[[Category:Prime numbers from 1-100]]

Revision as of 11:43, December 17, 2013

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