4421
This number is a prime.
4421 = 1! - 2! + 3! - 4! + 5! - 6! + 7! is prime. [Poo Sung]
The elevation of the summit of Mount Whitney, the highest summit in the contiguous United States, is 4421 meters using a new vertical datum established in 1988 (NAVD88). [Green]
Pope Francis's pontificate lasted exactly 4421 days. [Lewicki]
The largest prime obtained by inserting a composite number (n=42) between the digits of its previous double-digit prime (p=41). [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean