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  2. Ulam spiral - Wikipedia

    en.wikipedia.org/wiki/Ulam_spiral

    The Ulam spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanisław Ulam in 1963 and popularized in Martin Gardner's Mathematical Games column in Scientific American a short time later. [1]

  3. Prime form - Wikipedia

    en.wikipedia.org/wiki/Prime_form

    The prime form E is not quite a holomorphic function on X × X, but is a section of a holomorphic line bundle over this space. Prime forms were introduced by Friedrich Schottky and Felix Klein. Prime forms can be used to construct meromorphic functions on X with given poles and zeros. If Σn i a i is a divisor linearly equivalent to 0, then ΠE ...

  4. Primality test - Wikipedia

    en.wikipedia.org/wiki/Primality_test

    f p+1 ≡ 0 (mod p), where f k is the k-th Fibonacci number. The first condition is the Fermat primality test using base 2. In general, if p ≡ a (mod x 2 +4), where a is a quadratic non-residue (mod x 2 +4) then p should be prime if the following conditions hold: 2 p−1 ≡ 1 (mod p), f(1) p+1 ≡ 0 (mod p), f(x) k is the k-th Fibonacci ...

  5. Fermat number - Wikipedia

    en.wikipedia.org/wiki/Fermat_number

    As of 2024, it is known that F n is composite for 5 ≤ n ≤ 32, although of these, complete factorizations of F n are known only for 0 ≤ n ≤ 11, and there are no known prime factors for n = 20 and n = 24. [5] The largest Fermat number known to be composite is F 18233954, and its prime factor 7 × 2 18233956 + 1 was discovered in October 2020.

  6. Fibonacci prime - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_prime

    A prime divides if and only if p is congruent to ±1 modulo 5, and p divides + if and only if it is congruent to ±2 modulo 5. (For p = 5, F 5 = 5 so 5 divides F 5) . Fibonacci numbers that have a prime index p do not share any common divisors greater than 1 with the preceding Fibonacci numbers, due to the identity: [6]

  7. Sea Turtle Spirit Animal Symbolism & Meaning

    www.aol.com/sea-turtle-spirit-animal-symbolism...

    The sea turtle has been a powerful symbol for many cultures around the world for centuries. In some cultures, the turtle is seen as a symbol of good luck and prosperity.

  8. Formula for primes - Wikipedia

    en.wikipedia.org/wiki/Formula_for_primes

    However, it does not contain all the prime numbers, since the terms gcd(n + 1, a n) are always odd and so never equal to 2. 587 is the smallest prime (other than 2) not appearing in the first 10,000 outcomes that are different from 1. Nevertheless, in the same paper it was conjectured to contain all odd primes, even though it is rather inefficient.

  9. Turtle Spirit Animal Symbolism & Meaning

    www.aol.com/turtle-spirit-animal-symbolism...

    Turtle dreams mean you’re entering a time when you’ll need to practice strength, endurance, and perseverance. They are also associated with the element of water, which can represent emotions ...