diff --git a/incorrect_numbers.txt b/incorrect_numbers.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0931795027feb65af520f011ac39cfa217af5a7b
--- /dev/null
+++ b/incorrect_numbers.txt
@@ -0,0 +1,17 @@
+666343
+1
+2
+506156
+3
+0
+-44
+1021406
+-1
+-2
+913231
+-666343
+89567432895652
+675497777
+-6548989730999
+-4
+6654321198671111
\ No newline at end of file