FANDOM


m (Reverted edits by 176.205.103.87 (talk | block) to last version by 3primetime3)
Line 4: Line 4:
 
|imagewidth = 200
 
|imagewidth = 200
 
|roman-number = LXXI
 
|roman-number = LXXI
  +
|cardinal-number = seventy-one
  +
|Base-2 Form = 1000111
  +
|Base-3 Form = 2122
  +
|Base-4 Form = 1013
  +
|Base-5 Form = 241
  +
|Base-6 Form = 155
  +
|Base-7 Form = 131
  +
|Base-8 Form = 107
  +
|Base-9 Form = 78
 
|ordinal-number = seventy first|previous = [[67|<font color="white">67</font>]]
 
|ordinal-number = seventy first|previous = [[67|<font color="white">67</font>]]
 
|next = [[73|<font color="white">73</font>]]}}
 
|next = [[73|<font color="white">73</font>]]}}

Revision as of 01:25, December 28, 2013

71 is a 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.
Community content is available under CC-BY-SA unless otherwise noted.