diff --git a/rust/fourthfree/log b/rust/fourthfree/log
new file mode 100644
index 0000000..3021c34
--- /dev/null
+++ b/rust/fourthfree/log
@@ -0,0 +1,1000 @@
+8
+16
+32
+48
+64
+96
+112
+128
+144
+176
+192
+208
+224
+240
+243
+256
+272
+288
+304
+336
+352
+368
+384
+400
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+416
+432
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+512
+528
+544
+560
+567
+576
+592
+608
+624
+625
+656
+672
+688
+704
+720
+729
+736
+752
+768
+784
+912
+928
+944
+972
+976
+992
+L(10, 3)^4 =      700 (taking 0.000411s)
+1008
+1024
+1040
+1053
+1056
+1072
+1088
+1104
+1134
+1136
+1152
+1168
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+2688
+2704
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+2752
+2754
+2768
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+2800
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+2864
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+9904
+9936
+9952
+9963
+9968
+9984
+L(10, 4)^4 =     6496 (taking 0.002409s)
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diff --git a/rust/fourthfree/log2 b/rust/fourthfree/log2
new file mode 100644
index 0000000..5fbf638
--- /dev/null
+++ b/rust/fourthfree/log2
@@ -0,0 +1,1000 @@
+32
+48
+64
+80
+96
+112
+128
+144
+160
+162
+176
+192
+208
+224
+240
+243
+256
+272
+288
+304
+336
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+368
+384
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+416
+432
+448
+464
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+512
+528
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+729
+736
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+784
+810
+816
+832
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diff --git a/rust/fourthfree/log3 b/rust/fourthfree/log3
new file mode 100644
index 0000000..b6a2d24
--- /dev/null
+++ b/rust/fourthfree/log3
@@ -0,0 +1,1000 @@
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diff --git a/rust/fourthfree/src/main.rs b/rust/fourthfree/src/main.rs
index 19935bb..50ba997 100644
--- a/rust/fourthfree/src/main.rs
+++ b/rust/fourthfree/src/main.rs
@@ -6,8 +6,9 @@ const BASE: u64 = 10;
 fn is_fourth_free(x: &u64) -> bool {
     let mut i = 2;
     let mut fourth = i * i * i * i;
-    while fourth < *x {
+    while fourth <= *x {
         if x % fourth == 0 {
+            println!("{}", x);
             return false;
         }
         i += 1;