3

3
Basic Information
Cardinal Number	three
Ordinal Number	third
Roman Numeral	III
Greek Numeral	Γ´
Factorization	3
Different Representations
Binary Form	112
Ternary Form	103
Quaternary Form	34
Quinary Form	35
Senary Form	36
Septenary Form	37
Octal Form	38
Nonary Form	39
Undecimal Form	311
Duodecimal Form	312
Tridecimal Form	313
Quattuordecimal Form	314
Quindecimal Form	315
Hexadecimal Form	316
Septendecimal Form	317
Octodecimal Form	318
Novemdecimal Form	319
Vigesimal Form	320
Unvigesimal Form	321
Duovigesimal Form	322
Trevigesimal Form	323
Quattuorvigesimal Form	324
Quinvigesimal Form	325
Hexavigesimal Form	326
Septenvigesimal Form	327
Octovigesimal Form	328
Novemvigesimal Form	329
Trigesimal Form	330
Untrigesimal Form	331
Duotrigesimal Form	332
Tretrigesimal Form	333
Quattuortrigesimal Form	334
Quintrigesimal Form	335
Hexatrigesimal Form	336
Previous	[[2]]
Current	3
Next	[[5]]

3 is a prime number from 1-100. 3 is prime because it only has 2 factors, 1 and 3. It is said to be the first odd prime, because the previous prime number is 2, which is even. It is the second prime number, and the second prime number from 1-100.

Proofs

• It is divisible by 1: 3/1=3
• It is not divisible by 2: 3/2=1.5
• It is divisible by 3: 3/3=1
• Therefore it has 2 factors, not 3, because 3 cannot be divided by 2.

Relationship with other odd numbers

The numbers before

• 2 is the first prime number. It is the only even prime number.
• 1, the number before 2, is not a prime number.

The numbers after

• The next odd number, 5, is a prime number.
  • There are no odd numbers between 3 and 5. As a result, they are twin primes.
• 7, the odd number following 5, is a prime number.
  • 3 and 7 are four numbers apart, therefore, they are cousin primes.
• 9, the odd number following 7, is not a prime number. It is a square number, and the first odd composite number.

Prime Numbers 1-1,000