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  2. Least common multiple - Wikipedia

    en.wikipedia.org/wiki/Least_common_multiple

    For example, 10 is a multiple of 5 because 5 × 2 = 10, so 10 is divisible by 5 and 2. Because 10 is the smallest positive integer that is divisible by both 5 and 2, it is the least common multiple of 5 and 2. By the same principle, 10 is the least common multiple of −5 and −2 as well.

  3. Table of prime factors - Wikipedia

    en.wikipedia.org/wiki/Table_of_prime_factors

    lcm(m, n) (least common multiple of m and n) is the product of all prime factors of m or n (with the largest multiplicity for m or n). gcd(m, n) × lcm(m, n) = m × n. Finding the prime factors is often harder than computing gcd and lcm using other algorithms which do not require known prime factorization.

  4. Coprime integers - Wikipedia

    en.wikipedia.org/wiki/Coprime_integers

    The least common multiple of a and b is equal to their product ab, i.e. lcm(a, b) = ab. [4] As a consequence of the third point, if a and b are coprime and br ≡ bs (mod a), then r ≡ s (mod a). [5] That is, we may "divide by b" when working modulo a.

  5. Highly composite number - Wikipedia

    en.wikipedia.org/wiki/Highly_composite_number

    Demonstration, with Cuisenaire rods, of the first four highly composite numbers: 1, 2, 4, 6. A highly composite number is a positive integer that has more divisors than all smaller positive integers.

  6. LCM - Wikipedia

    en.wikipedia.org/wiki/Lcm

    LCM may refer to: Computing and mathematics. Latent class model, a concept in statistics; Least common multiple, a function of two integers; Living Computer Museum;

  7. Greatest common divisor - Wikipedia

    en.wikipedia.org/wiki/Greatest_common_divisor

    gcd(a, b) is closely related to the least common multiple lcm(a, b): we have gcd(a, b)⋅lcm(a, b) = | a⋅b |. This formula is often used to compute least common multiples: one first computes the GCD with Euclid's algorithm and then divides the product of the given numbers by their GCD. The following versions of distributivity hold true:

  8. 56 (number) - Wikipedia

    en.wikipedia.org/wiki/56_(number)

    Regular 56-gon, associated by the Pythagoreans with Typhon. 56 is: The sum of the first six triangular numbers (making it a tetrahedral number). [1] The number of ways to choose 3 out of 8 objects or 5 out of 8 objects, if order does not matter. The sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17)

  9. List of world records in swimming - Wikipedia

    en.wikipedia.org/wiki/List_of_world_records_in...

    56.88 sf: Adam Peaty Great Britain 21 July 2019: World Championships: Gwangju, South Korea [33] [34] 200m breaststroke: 2:05.48 Qin Haiyang China 28 July 2023: World Championships: Fukuoka, Japan [35] [36] 50m butterfly: 22.27 Andriy Govorov Ukraine 1 July 2018: Sette Colli Trophy Rome, Italy [37] [38] 100m butterfly: 49.45 Caeleb Dressel ...