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  2. Code Ninjas - Wikipedia

    en.wikipedia.org/wiki/Code_Ninjas

    Code Ninjas is a for-profit educational organization specializing in teaching coding to kids, and is the largest kids coding franchise in the world with over 400 locations open and operating in three countries. [1] It is headquartered in Pearland, Texas. [2] It was founded by David Graham in 2016, inspired by watching his son learn Tae Kwon Do. [3]

  3. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    Largest base for which all left-truncatable primes are known. 90: Nonagesimal: Related to Goormaghtigh conjecture for the generalized repunit numbers (111 in base 90 = 1111111111111 in base 2). 95: Number of printable ASCII characters. [63] 96: Total number of character codes in the (six) ASCII sticks containing printable characters. 97

  4. Permutation - Wikipedia

    en.wikipedia.org/wiki/Permutation

    Find the largest index k such that a[k] < a[k + 1]. If no such index exists, the permutation is the last permutation. Find the largest index l greater than k such that a[k] < a[l]. Swap the value of a[k] with that of a[l]. Reverse the sequence from a[k + 1] up to and including the final element a[n].

  5. History of large numbers - Wikipedia

    en.wikipedia.org/wiki/History_of_large_numbers

    The Ancient Greeks used a system based on the myriad, that is, ten thousand, and their largest named number was a myriad myriad, or one hundred million. In The Sand Reckoner, Archimedes (c. 287–212 BC) devised a system of naming large numbers reaching up to. essentially by naming powers of a myriad myriad. This largest number appears because ...

  6. Largest known prime number - Wikipedia

    en.wikipedia.org/wiki/Largest_known_prime_number

    The following table lists the progression of the largest known prime number in ascending order. [3] Here M p = 2 p − 1 is the Mersenne number with exponent p, where p is a prime number. The longest record-holder known was M 19 = 524,287, which was the largest known prime for 144 years. No records are known prior to 1456.

  7. Integer factorization records - Wikipedia

    en.wikipedia.org/wiki/Integer_factorization_records

    The largest number reliably factored [clarification needed] by Shor's algorithm is 21 which was factored in 2012. [ 23 ] 15 had previously been factored by several labs. In April 2012, the factorization of 143 = 13 × 11 by a room-temperature (300 K) NMR adiabatic quantum computer was reported by a group led by Xinhua Peng. [ 24 ]

  8. Graham's number - Wikipedia

    en.wikipedia.org/wiki/Graham's_number

    Graham's number was used by Graham in conversations with popular science writer Martin Gardner as a simplified explanation of the upper bounds of the problem he was working on. In 1977, Gardner described the number in Scientific American, introducing it to the general public. At the time of its introduction, it was the largest specific positive ...

  9. Langford pairing - Wikipedia

    en.wikipedia.org/wiki/Langford_pairing

    A Langford pairing for n = 4. In combinatorial mathematics, a Langford pairing, also called a Langford sequence, is a permutation of the sequence of 2 n numbers 1, 1, 2, 2, ..., n, n in which the two 1s are one unit apart, the two 2s are two units apart, and more generally the two copies of each number k are k units apart.