fix: Update proof link to a stable Rosetta Code source

ArnabTechiee · ArnabTechiee · commit 9c25148aff9a · 2025-10-18T10:25:46.000+05:30
diff --git a/project_euler/problem_034/sol1.py b/project_euler/problem_034/sol1.py
@@ -31,7 +31,7 @@ def solution() -> int:
     40730
     """
     # The upper bound is 1,499,999, as shown in this proof:
-    # https://math.stackexchange.com/a/112383/89462
+    # https://rosettacode.org/wiki/Talk:Factorions
     limit = 1_499_999
     return sum(i for i in range(3, limit) if sum_of_digit_factorial(i) == i)
 

Original file line number	Diff line number	Diff line change
`@@ -31,7 +31,7 @@ def solution() -> int:`
`31`	`31`	`40730`
`32`	`32`	`"""`
`33`	`33`	`# The upper bound is 1,499,999, as shown in this proof:`
`34`		`- # https://math.stackexchange.com/a/112383/89462`
	`34`	`+ # https://rosettacode.org/wiki/Talk:Factorions`
`35`	`35`	`limit = 1_499_999`
`36`	`36`	`return sum(i for i in range(3, limit) if sum_of_digit_factorial(i) == i)`
`37`	`37`