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|imagewidth = 200 |
|imagewidth = 200 |
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|roman-number = LXXI |
|roman-number = LXXI |
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+ | |cardinal-number = seventy-one |
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− | |ordinal-number = sixty seventh|previous = [[67|<font color="white">67</font>]] |
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+ | |Base-2 Form = 1000111 |
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− | |next = [[73|<font color="white">73</font>]]}} |
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+ | |Base-8 Form = 107 |
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+ | |Base-16 Form = 47 |
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+ | |ordinal-number = seventy first |
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+ | |previous = 67 |
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+ | |next = 73|standard-form = 7.1{{E|1}}}} |
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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. |
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− | == |
+ | ==Proofs== |
+ | *{{Divisibility number|Yes|1.}} |
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− | *1 can divide 71 |
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+ | *{{Divisibility number|No|2-70.}} |
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− | *2 cannot |
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+ | *{{Divisibility number|Yes|{{PAGENAME}}.}} |
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− | *3 cannot |
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+ | |||
− | *4 - 70 cannot |
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+ | ==As an Exponent of Mersenne Number== |
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− | *71 can! |
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+ | 2<sup>71</sup> - 1 can be divided by numbers such as [[228,479]] and 48,544,121, and is therefore not a prime number. |
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+ | |||
+ | ==Relationship with other odd numbers== |
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+ | ===The numbers before=== |
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+ | *The previous odd number, 69, is not a prime number. It is divisible by 3. |
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+ | *The odd number previous to 69 is 67. 67 is a prime number. |
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+ | **67 and 71 are four numbers apart; therefore, they are cousin primes. |
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+ | *The odd number previous to 67 is 65. 65 is not a prime number. It is divisible by 5. |
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+ | ===The numbers after=== |
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+ | *The next odd number, 73, is a prime number. |
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+ | **There are no odd numbers between 71 and 73. As a result, they are twin primes. |
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+ | *75, the odd number following 73, is not a prime number. It is divisible by 5. |
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+ | *77, the odd number following 75, is also not a prime number. It is divisible by 7. |
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+ | *79 is the next prime number after 73. |
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{{Navbox_primes}} |
{{Navbox_primes}} |
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[[Category:Prime Numbers]] |
[[Category:Prime Numbers]] |
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[[Category:Prime numbers from 1-100]] |
[[Category:Prime numbers from 1-100]] |
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+ | [[Category:2-Digit Prime Numbers]] |
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+ | [[Category:Twin Primes]] |
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+ | [[Category:Circular Primes]] |
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+ | [[Category:Cousin Primes]] |
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+ | [[Category:Chen Primes]] |
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+ | [[Category:Multiplicative Persistence 1]] |
Revision as of 13:36, 5 July 2016
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
As an Exponent of Mersenne Number
271 - 1 can be divided by numbers such as 228,479 and 48,544,121, and is therefore not a prime number.
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.