In Mathematics
- An odd number
- The smallest number that can't be represented as a sum of fewer than 19 fourth powers
- A strictly non-palindromic number
- The 22nd prime number (the next is 83)
- The smallest prime number p for which the real quadratic field Q has class number greater than 1 (namely 3)
- A cousin prime with 83
- An emirp, because the reverse of 79, 97, is also a prime
- A fortunate prime
- A prime number that is also a Gaussian prime (since it is of the form )
- A happy prime
- A Higgs prime
- A Kynea prime
- A lucky prime
- A permutable prime, with ninety-seven
- A Pillai prime, because 23! + 1 is divisible by 79, but 79 is not one more than a multiple of 23
- A regular prime
- A prime in a residue classes 4n+3, 8n+7, and 10n+9
- A right-truncatable prime, because when the last digit (9) is removed, the remaining number (7) is still prime
- A sexy prime (with 73)
- The n value of the Wagstaff prime 201487636602438195784363
Read more about this topic: 79 (number)
Famous quotes containing the word mathematics:
“In mathematics he was greater
Than Tycho Brahe, or Erra Pater:
For he, by geometric scale,
Could take the size of pots of ale;
Resolve, by sines and tangents straight,
If bread and butter wanted weight;
And wisely tell what hour o’ th’ day
The clock doth strike, by algebra.”
—Samuel Butler (1612–1680)