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  2. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and ... 5 p − 1 ≡ 1 (mod p 2): 2, 20771, 40487, 53471161, ...

  3. Number line - Wikipedia

    en.wikipedia.org/wiki/Number_line

    A number line is usually represented as being horizontal, but in a Cartesian coordinate plane the vertical axis (y-axis) is also a number line. [5] The arrow on the line indicates the positive direction in which numbers increase. [5] Some textbooks attach an arrow to both sides, suggesting that the arrow indicates continuation.

  4. Ulam spiral - Wikipedia

    en.wikipedia.org/wiki/Ulam_spiral

    Diagonal, horizontal, and vertical lines in the number spiral correspond to polynomials of the form = + + where b and c are integer constants. When b is even, the lines are diagonal, and either all numbers are odd, or all are even, depending on the value of c. It is therefore no surprise that all primes other than 2 lie in alternate diagonals ...

  5. File:Number-line.svg - Wikipedia

    en.wikipedia.org/wiki/File:Number-line.svg

    Date/Time Thumbnail Dimensions User Comment; current: 02:26, 1 November 2021: 750 × 50 (2 KB): Mikhail Ryazanov: minuses instead of hypens: 08:50, 27 September 2019

  6. Prime number - Wikipedia

    en.wikipedia.org/wiki/Prime_number

    A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself. However, 4 is composite because it is a ...

  7. 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. [4] 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. [citation needed]

  8. Printer's key - Wikipedia

    en.wikipedia.org/wiki/Printer's_key

    This is how the printer's key may appear in the first print run of a book. In this common example numbers are removed with subsequent printings, so if "1" is seen then the book is the first printing of that edition. If it is the second printing then the "1" is removed, meaning that the lowest number seen will be "2". [3]

  9. File:Number line with addition of 1 and 2.svg - Wikipedia

    en.wikipedia.org/wiki/File:Number_line_with...

    Addition on the number line with the example (-2)+3=1. SVG development . The SVG code is . This vector image was created with Inkscape, or with something else ...