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Tag: rte-source
(Undo revision 14836 by 71.3.138.124 (talk))
Tag: rte-source
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|Base-16 Form = 47
 
|Base-16 Form = 47
 
|ordinal-number = seventy first
 
|ordinal-number = seventy first
|previous = 107
+
|previous = 67
 
|next = 73|standard-form = 7.1{{E|1}}}}
 
|next = 73|standard-form = 7.1{{E|1}}}}
 
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.
 
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.

Revision as of 10:28, 8 May 2015

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

  • Yes — 71 can be divided by 1.
  • No — 71 cannot be divided by 2-70.
  • Yes — 71 can be divided by 71.

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.