3719

This number is a prime.

Just showing those entries submitted by 'Nie': (Click here to show all)

There are are 3719 different ways to arrange the set of twelve pentominoes into a rectangle (6-by-10, 5-by-12, 4-by-15, or 3-by-20), counting up to rotations and reflections. [Nie]

Chebyshev's bias indicates that prime numbers up to n for any natural number n tend to end in 3 or 7 slightly more often than 1 or 9. [Nie]