Prime number (English)
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Definition (keystage 2)
A prime number is a number with exactly two factors, which are one, and itself.
2 has the factors 1 and 2;
3 has the factors 1 and 3;
5 has the factors 1 and 5;
11 has the factors 1 and 11
Numbers which are not prime are called composite numbers.
2 has the factors 1 and 2;
3 has the factors 1 and 3;
5 has the factors 1 and 5;
11 has the factors 1 and 11
Numbers which are not prime are called composite numbers.
Relations
- broader:
- (en) Integer with special properties
- narrower:
- (en) Cunningham chain
- (en) Fermat prime
- (en) Germain prime
- (en) Mersenne prime
- (en) Prime factor
- (en) Prime pair
- (en) Titanic prime
- references:
- (en) Cryptography
- (en) Number of divisors
- (en) Skewes' number
- referenced:
- (en) 11
- (en) 2
- (en) Bertrand's conjecture
- (en) Cauchy's group theorem
- (en) Composite number
- (en) Dirichlet's theorem
- (en) Divisor
- (en) Fundamental theorem of arithmetic
- (en) Primality
- (en) Riemann zeta function
- (en) RSA algorithm
- (en) Simple group
- (en) The square root of any prime number is irrational
- (en) Thirteen
- see also:
- (en) Prime
- (en) Pseudoprime
- (en) Semi-prime number
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