This number is a prime.
The product of the initial six hexagonal numbers plus one is the prime. We note that 1 * 6 * 15 * 28 * 45 * 66 + 1 = 7484401. [Schiffman]
The product of the initial six hexagonal numbers plus one is the prime. We note that 1 * 6 * 15 * 28 * 45 *
66 + 1 = 7484401. [Schiffman]