To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

# 73 (number)

 ← 72 73 74 →
Cardinalseventy-three
Ordinal73rd
(seventy-third)
Factorizationprime
Prime21st
Divisors1, 73
Greek numeralΟΓ´
Roman numeralLXXIII
Binary10010012
Ternary22013
Quaternary10214
Quinary2435
Senary2016
Octal1118
Duodecimal6112
Vigesimal3D20
Base 362136

73 (seventy-three) is the natural number following 72 and preceding 74. In English, it is the smallest natural number with twelve letters in its spelled out name.

• 1/5
Views:
1 285
2 947
20 560
3 663
3 730
• ✪ Angel Number 73: The Meanings of Angel Number 73
• ✪ Monstermatics ®
• ✪ Idea Makers: Research, Writing, and the Path to Law Teaching at Harvard Law School
• ✪ sure haj 73 74 AIK MAKKHI KI MISAL
• ✪ Dr Zakir Naik or Wahabis are Kafirs etc Pashto

## In mathematics

73 is:

• the 21st prime number. The previous is 71, with which it composes the 8th twin prime.
• a permutable prime with 37.
• a star number.[1]
• the largest minimal primitive root in the first 100,000 primes. In other words, if p is one of the first 100,000 primes, then at least one of the numbers 2, 3, 4, 5, 6, ..., 72, 73 is a primitive root modulo p.
• the smallest prime congruent to 1 modulo 24.
• an emirp, meaning that the reverse of 73, that is, 37, is also a prime number.[2] 73 is the 21st prime number while 37 is the 12th prime number.
• has the product property[3], i.e. the product of its base-10 digits is precisely its index in the sequence of primes: 7 × 3 = 21 and 73 is the 21st prime number. It also has the mirror property[3], as its permutable prime 37 is the 12th prime number, which is, again, the reverse of 21. Because of these two properties, it is the sole Sheldon prime[4], an homage to Sheldon Cooper, the fictional theoretical physicist on the television show The Big Bang Theory, who claimed that 73 is the best number.
• the smallest prime with a composite sum of digits, in base 5.
• palindromic in bases 2 (10010012) and 8 (1118).
• the only prime repunit in base 8 (1118).
• the smallest factor of the first composite generalized Fermat number in base 10 (104 + 1 = 10,001 = 73 × 137).

Also:

• The number 21 has prime factors 7 and 3. The number 21 in binary is 10101; 7 in binary is 111, 3 in binary is 11, and seventy-three in binary is 1001001. All of these are palindromes. In addition, of the 7 binary digits representing 73, there are 3 ones. Also, 37 + 12 = 49 (seven squared) and 73 + 21 = 94 = 47 × 2, 47 + 2 also being equal to seven squared. Additionally, both 73 and its mirror, 37, are sexy primes twice over, as 31, 43, 67 and 79 are all prime numbers.
• In addition to having prime factors 7 and 3, the number 21 represents the  ternary (base-3) equivalent of the decimal numeral 7, or 213 = 710.
• 73 = 343, a palindrome. Replacing the first two digits of 343 with their sum yields 73.
• Every positive integer can be written as the sum of 73 or fewer sixth powers (see Waring's problem).

73 is also: