Factorial prime - Wikipedia
A factorial prime is a prime number that is one less or one more than a factorial (all factorials greater than 1 are even). [1] The first 10 factorial primes (for n = 1, 2, 3, 4, 6, 7, 11, 12, 14) are (sequence A088054 in the OEIS):
Factorial Prime -- from Wolfram MathWorld
A factorial prime is a prime number of the form n!+/-1, where n! is a factorial. n!-1 is prime for n=3, 4, 6, 7, 12, 14, 30, 32, 33, 38, 94, 166, 324, 379, 469, 546, 974, 1963, 3507, 3610, 6917, 21480, 26951, 34790, 94550, 103040, 147855, 208003, ...
Factorial Prime - GeeksforGeeks
Oct 14, 2024 · A factorial prime is a prime number that can be expressed as n!−1 or n!+1. How are factorial primes related to factorials? Factorial primes are derived from the factorial function, which calculates the product of all positive integers up to n.
factorial prime - PlanetMath.org
A factorial prime is a number that is one less or one more than a factorial and is also a prime number. The first few factorial primes are: 2, 3, 5, 7, 23, 719, 5039, 39916801, 479001599, 87178291199 ( sequence A088054 in the OEIS).
The Prime Glossary: factorial prime - PrimePages
factorial prime. The only factorial that is prime is 2!, so if " factorial primes" are to be worth mentioning, the term must mean something other than a factorial that is prime. In fact, as usually defined, factorial primes come in two flavors: factorials plus one …
What are factorials, and how do they work? | Purplemath
Factorials are very simple things; they're just products, and are indicated by an exclamation mark. For instance, "four factorial" is written as 4! and means the product of the whole numbers between 1 and 4. 1×2×3×4 = 24.
Factorial in Maths: Definition, Formulas & Applications
Oct 23, 2024 · A factorial prime is a prime number that is one more or one less than a factorial, i.e., it has the form: p = n! ± 1 Where n! (n factorial) is the product of all the positive integers up to that number n, and p is a prime number. First few factorial primes are: 2, 3, 5, 7, 23, 719, 5039, 39916801, 479001599, 87178291199 ...
Prime Factorization - Math is Fun
Factors. "Factors" are the numbers you multiply together to get another number: Prime Factorization. "Prime Factorization" is finding which prime numbers multiply together to make the original number. Here are some examples: Example: What are the prime factors of 12 ?
Factorial primes - Rosetta Code
Oct 16, 2024 · A factorial prime is a prime number that is one less or one more than a factorial. In other words a non-negative integer n corresponds to a factorial prime if either n! - 1 or n! + 1 is prime. Examples. 4 corresponds to the factorial prime 4! - 1 = 23.
Factorial prime - Scientific Lib
A factorial prime is a prime number that is one less or one more than a factorial (all factorials > 1 are even). The first few factorial primes are: 2 (0! + 1 or 1! + 1), 3 (2! + 1), 5 (3! − 1), 7 (3! + 1), 23 (4! − 1), 719 (6! − 1), 5039 (7! − 1), 39916801 (11! + …