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73 is a prime number from 1-100. 73 has 2 factors, 1 and 73. It is the 21st prime number, and the 21st prime number from 1-100.

ProofsEdit

  • Yes — 73 can be divided by 1.
  • No — 73 cannot be divided by 2-72.
  • Yes — 73 can be divided by 73.


As an Exponent of Mersenne NumberEdit

273 - 1 can be divided by 439, and is therefore not a prime number.

Relationship with other odd numbersEdit

The number reversedEdit

  • 73 is the 21st prime number, 73 reversed is 37. 37 is the 12th prime number and 12 is 21 reversed.

The numbers beforeEdit

  • The previous odd number, 71, is a prime number.
    • There are no odd numbers between 71 and 73. As a result, they are twin primes.
  • The odd number previous to 71 is 69. 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 73 are six numbers apart; therefore, they are sexy primes.

The numbers afterEdit

  • The next odd number, 75, 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, the odd number following 77, is a prime number.
    • 73 and 79 are six numbers apart; therefore, they are sexy primes.

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