project-euler: Rewrap, update links, add copyrights, tests

[factor.git] / extra / project-euler / 027 / 027.factor

diff --git a/extra/project-euler/027/027.factor b/extra/project-euler/027/027.factor
index a6aa6538b9a0ae8de1a80ee6ca4dd71205d11d41..2e5efbfb8f8398a569f3bde4ca47e8fd0d238b45 100644 (file)
--- a/extra/project-euler/027/027.factor
+++ b/extra/project-euler/027/027.factor
@@ -3,7 +3,7 @@
 USING: kernel math math.primes project-euler.common sequences ;
 IN: project-euler.027
 
-! https://projecteuler.net/index.php?section=problems&id=27
+! https://projecteuler.net/problem=27
 
 ! DESCRIPTION
 ! -----------
@@ -12,14 +12,15 @@ IN: project-euler.027
 
 !     n² + n + 41
 
-! It turns out that the formula will produce 40 primes for the consecutive
-! values n = 0 to 39. However, when n = 40, 402 + 40 + 41 = 40(40 + 1) + 41 is
-! divisible by 41, and certainly when n = 41, 41² + 41 + 41 is clearly
-! divisible by 41.
+! It turns out that the formula will produce 40 primes for the
+! consecutive values n = 0 to 39. However, when n = 40, 402 + 40
+! + 41 = 40(40 + 1) + 41 is divisible by 41, and certainly when
+! n = 41, 41² + 41 + 41 is clearly divisible by 41.
 
-! Using computers, the incredible formula n² - 79n + 1601 was discovered, which
-! produces 80 primes for the consecutive values n = 0 to 79. The product of the
-! coefficients, -79 and 1601, is -126479.
+! Using computers, the incredible formula n² - 79n + 1601 was
+! discovered, which produces 80 primes for the consecutive
+! values n = 0 to 79. The product of the coefficients, -79 and
+! 1601, is -126479.
 
 ! Considering quadratics of the form:
 
@@ -28,9 +29,9 @@ IN: project-euler.027
 !     where |n| is the modulus/absolute value of n
 !     e.g. |11| = 11 and |-4| = 4
 
-! Find the product of the coefficients, a and b, for the quadratic expression
-! that produces the maximum number of primes for consecutive values of n,
-! starting with n = 0.
+! Find the product of the coefficients, a and b, for the
+! quadratic expression that produces the maximum number of
+! primes for consecutive values of n, starting with n = 0.
 
 
 ! SOLUTION