79

79
Basic Information
Cardinal Number	seventy-nine
Ordinal Number	seventy ninth
Roman Numeral	LXXIX
Greek Numeral	ΟΘ´
Factorization	79
Standard Form	7.9 × 101
Different Representations
Binary Form	10011112
Ternary Form	22213
Quaternary Form	10334
Quinary Form	3045
Senary Form	2116
Septenary Form	1427
Octal Form	1178
Nonary Form	879
Undecimal Form	7211
Duodecimal Form	6712
Tridecimal Form	6113
Quattuordecimal Form	5914
Quindecimal Form	5415
Hexadecimal Form	4F16
Septendecimal Form	4B17
Octodecimal Form	4718
Novemdecimal Form	4319
Vigesimal Form	3J20
Unvigesimal Form	3G21
Duovigesimal Form	3D22
Trevigesimal Form	3A23
Quattuorvigesimal Form	3724
Quinvigesimal Form	3425
Hexavigesimal Form	3126
Septenvigesimal Form	2P27
Octovigesimal Form	2N28
Novemvigesimal Form	2L29
Trigesimal Form	2J30
Untrigesimal Form	2H31
Duotrigesimal Form	2F32
Tretrigesimal Form	2D33
Quattuortrigesimal Form	2B34
Quintrigesimal Form	2935
Hexatrigesimal Form	2736
Previous	73
Current	79
Next	83

79 is a prime number from 1-100. 79 has 2 factors, 1 and 79. It's the 22nd prime number and the 22nd prime number from 1-100.

Proofs

• — 79 can be divided by 1.

• — 79 cannot be divided by 2-78.

• — 79 can be divided by 79.

As an Exponent of Mersenne Number

2⁷⁹ - 1 can be divided by 2,687, and is therefore not a prime number.

Relationship with other odd numbers

The numbers before

• The previous prime number is 73. All numbers between 73 and 79 are composite.
  • Among them, 75 is divisible by 5, while 77 is divisible by 7 and 11.
  • 73 and 79 are six numbers apart; therefore, they are sexy primes.

The numbers after

• The next odd number, 81, is not a prime number. It is a square of 9 and the fourth power of 3.
• 83, the odd number following 81, is a prime number.
  • 79 and 83 are four numbers apart; therefore, they are cousin primes.

Prime Numbers 1-1,000