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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.
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