Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 745th nullie 894 93 128ms 19 Dec 2024 745th lolgeny 894 93 124ms 22 Feb 2025 753rd Shanethegamer 🇺🇸 893 61 6ms 31 Oct 2022 753rd MeWhenI 🇻🇦 893 61 5ms 4 Nov 2022 755th JayXon 🇺🇸 893 74 3,478ms 14 Nov 2024 756th GolfingSuccess 🇬🇷 893 95 65ms 5 May 2022 756th Alex-x90 🇺🇸 893 95 69ms 4 Dec 2022 756th Mandrzejy 🇵🇱 893 95 62ms 22 Mar 2024 759th m-tkach 🇺🇦 893 117 27ms 7 May 2022 759th Lydxn 🇨🇦 893 117 28ms 7 May 2022 761st Steffan153 🇫🇮 892 52 7ms 31 Dec 2022 762nd KatieLG 🇬🇧 892 60 11ms 4 May 2022 762nd ScottHamper 892 60 10ms 5 May 2022 762nd Re-Adventures 🇮🇳 892 60 12ms 5 May 2022 762nd 0x24a537r9 892 60 11ms 29 Jul 2022 762nd stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 762nd eranws 892 60 10ms 10 Sep 2022 762nd GeorgeStechman 🇬🇧 892 60 10ms 26 Sep 2022 762nd BloodStormKnight 892 60 11ms 15 Oct 2022 762nd dzshn 892 60 12ms 3 Dec 2022 762nd biocommando 🇫🇮 892 60 9ms 20 Dec 2022 762nd Betuaredead 892 60 10ms 5 Jan 2023 762nd piano-miles 892 60 11ms 16 Jan 2023 762nd Yewzir 🇧🇪 892 60 10ms 12 Feb 2023 762nd shellbertt 🇨🇦 892 60 10ms 26 Feb 2023 762nd zakariamouhid 892 60 10ms 20 May 2023 762nd raphaelimahorn 892 60 10ms 23 Aug 2023 762nd jbt 892 60 11ms 25 Dec 2023 762nd olleicua 🇺🇸 892 60 11ms 15 Feb 2024 762nd HumanoidCPU 892 60 11ms 3 May 2024 762nd dokutan 892 60 13ms 13 Aug 2024 762nd LostSyntax21 🇬🇧 892 60 10ms 10 Sep 2024 762nd xyangst 892 60 10ms 28 Sep 2024 762nd a6166231 🇨🇳 892 60 10ms 15 May 2025 762nd Protothor 892 60 10ms 8 Jul 2025 762nd SebassNoob 892 60 11ms 5 Aug 2025 762nd Yax42 🇫🇷 892 60 11ms 5 Sep 2025 762nd levinwinter 892 60 11ms 14 days ago 789th stefangimmillaro 892 71 98ms 2 Oct 2022 789th Steffan153 🇫🇮 892 71 103ms 23 Feb 2023 789th Shanethegamer 🇺🇸 892 71 98ms 16 May 2023 789th sean-niemann 🇺🇸 892 71 99ms 12 Jul 2024 793rd sean-niemann 🇺🇸 892 109 240ms 25 May 2024 793rd GolfingSuccess 🇬🇷 892 109 291ms 6 Sep 2025 795th lynn 891 65 316ms 5 May 2022 795th GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 795th Sakisan 🇧🇪 891 65 214ms 6 May 2022 795th JayXon 🇺🇸 891 65 366ms 17 Oct 2022 795th Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 795th tobeannouncd 891 65 331ms 25 Apr 2025 795th sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 802nd RockOfStone 891 73 5ms 16 days ago 803rd canissimia 🇦🇶 891 110 3,068ms 20 Feb 2023 804th primo-ppcg 🇹🇭 890 52 213ms 5 May 2022 804th dvargas46 🇺🇸 890 52 83ms 22 Dec 2022 806th DialFrost 🇸🇬 890 56 1,411ms 1 Sep 2025 807th GrayJoKing 🇦🇺 890 77 76ms 13 Sep 2024 808th DialFrost 🇸🇬 890 95 32ms 10 Dec 2024 809th martinnorling 🇸🇪 889 75 24ms 5 May 2022 809th Trunksistor 🇫🇷 889 75 23ms 9 May 2022 809th bbakersmith 889 75 30ms 28 Jun 2022 809th bsoyka 🇺🇸 889 75 20ms 16 Jul 2022 809th P-Quentin 🇫🇷 889 75 18ms 3 Aug 2022 809th julienlamoureux78 889 75 20ms 12 Aug 2022 809th dzshn 889 75 29ms 16 Aug 2022 809th NerdyMcNerd42 889 75 19ms 20 Aug 2022 809th destofr 889 75 20ms 25 Aug 2022 809th vishwathg 889 75 47ms 10 Oct 2022 809th nkoppel 889 75 19ms 19 Oct 2022 809th AZ9tumas 889 75 21ms 23 Oct 2022 809th EthanGrant1 889 75 33ms 7 Nov 2022 809th Omega65536 🇩🇪 889 75 18ms 24 Nov 2022 809th b10011 🇫🇮 889 75 27ms 3 Jan 2023 809th 4ndyJ 🇬🇧 889 75 23ms 3 Jan 2023 809th randolchance 889 75 19ms 8 Jan 2023 First Prev 751–825 of 3,423 Next Last