This calculator performs the decomposition of a number into its prime factors and lists all its natural divisors. Enter an integer between 1 and 1,000,000.
1) Relation to multiples of 6: Every prime number greater than 3 is always one less or one more than a multiple of 6.
Example: `79621` is 1 more than `79620` (multiple of 6).
2) Square minus 1 divisible by 24: For every prime number greater than 3, if 1 is subtracted from its square, the result is always divisible by 24.
Example: The square of `79621` is `6339503641`. Subtracting 1, we get `6339503640`. Note that `6339503640 ÷ 24 = 264145985`.
3) Difference of squares: Every prime number greater than 2 can be expressed as the difference of the squares of two consecutive natural numbers.
Example: `79621 = 39811^2 - 39810^2 = 1584915721 - 1584836100`
4) Sum of two squares: Every prime number of the form `4n+1` (where n is a positive natural number) can be expressed as the sum of two squares.
Example: `79621 = 150^2 + 239^2 = 22500 + 57121`, where `79621 = 4 × 19905 + 1`.
5) Form `4n+1` or `4n-1`: Except for the number 2, all prime numbers follow the pattern `4n+1` or `4n-1`, where `n` is a natural number.
Example: `79621` is of the form `4n+1`, where `n = 19905`.
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