factorial prime

名詞

(mathematics) A prime number that is one more or one less than a factorial. For example, 7 is a factorial prime, since 3! + 1 = 7.

日本語の意味

数学において、階乗の直前または直後の数が素数となる素数。例えば、7は3!+1=7であり、階乗素数に該当する。

A factorial prime is a prime number that is either one more or one less than a factorial, as with 7 = 3! + 1.

階乗に1を足すか1を引いた形の素数で、例えば7 = 3! + 1がその例です。

意味（1）

(mathematics) A prime number that is one more or one less than a factorial. For example, 7 is a factorial prime, since 3! + 1 = 7.

factorial primes

（ plural ）