4421
This number is a prime.
Just showing those entries submitted by 'Poo Sung': (Click here to show all)
4421 = 1! - 2! + 3! - 4! + 5! - 6! + 7! is prime. [Poo Sung]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
Just showing those entries submitted by 'Poo Sung': (Click here to show all)
4421 = 1! - 2! + 3! - 4! + 5! - 6! + 7! is prime. [Poo Sung]