## Project Euler #011 - Largest product in a grid

more ...What is the greatest product of four adjacent numbers in the same direction (up, down, left, right, or diagonally) in the 20×20 grid?

more ...What is the greatest product of four adjacent numbers in the same direction (up, down, left, right, or diagonally) in the 20×20 grid?

more ...The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.

Find the sum of all the primes below two million.

more ...A Pythagorean triplet is a set of three natural numbers, \(a < b < c\), for which,

\(\qquad a^2 + b^2 = c^2\)

For example, \(3^2 + 4^2 = 25 = 5^2\)

There exists exactly one Pythagorean triplet for which \(a + b + c = 1000\).

Find the product \(abc\).

more ...Find the thirteen adjacent digits in the 1000-digit number that have the greatest product. What is the value of this product?

more ...By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.

What is the 10001st prime number?