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 Binary Lambda Calculus Calendar Connect Four Crossword 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 Binary Lambda Calculus Calendar Connect Four Crossword 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 807th keelimeguy 🇺🇸 875 74 20ms 13 May 2025 807th TheZwierzLF 🇵🇱 875 74 20ms 21 May 2025 807th kbeat 🇰🇿 875 74 23ms 21 May 2025 807th LvLError 875 74 19ms 29 May 2025 807th Lv0Sys 🇵🇱 875 74 18ms 30 May 2025 807th ffelixm 875 74 25ms 3 Jun 2025 807th Flekay 🇩🇪 875 74 27ms 19 Jun 2025 807th DoubleUynn 875 74 20ms 25 Jun 2025 807th osNiko 🇧🇷 875 74 20ms 26 Jul 2025 807th wobblybits 875 74 20ms 13 Aug 2025 807th denisfouchard 875 74 22ms 23 Aug 2025 807th Emutis 🇱🇹 875 74 31ms 23 Aug 2025 807th edsrzf 🇳🇿 875 74 20ms 10 Sep 2025 807th Matter1024 🇮🇳 875 74 20ms 11 Sep 2025 807th pauljoohyunkim 875 74 20ms 25 Sep 2025 807th joll05 🇸🇪 875 74 25ms 1 Oct 2025 807th retrohun 875 74 27ms 3 Oct 2025 807th solisolu 875 74 21ms 4 Oct 2025 807th Code-Coder-coder 875 74 19ms 12 Oct 2025 807th fvla 875 74 23ms 13 days ago 921st AlephSquirrel 875 80 14ms 20 Apr 2023 921st ashtraypettingzoo 🇺🇸 875 80 14ms 1 Apr 2024 923rd c0d3-4-F00d 🇩🇪 875 89 344ms 5 May 2022 923rd fkantelberg 875 89 401ms 15 Jul 2023 923rd TRexOnGit 875 89 360ms 16 Feb 2024 926th ovs-code 🇩🇪 874 85 17ms 11 Dec 2023 927th inventshah 874 97 53ms 6 May 2022 927th roupiq 🇵🇱 874 97 49ms 22 Nov 2023 929th MeWhenI 🇻🇦 873 71 96ms 13 Dec 2022 930th Irratix 🇳🇱 873 72 3ms 4 May 2022 930th m-tkach 🇺🇦 873 72 2ms 4 May 2022 930th jared-hughes 873 72 3ms 6 Jul 2022 930th michael-pruglo 🇺🇦 873 72 3ms 13 Jul 2022 930th Steffan153 🇫🇮 873 72 3ms 3 Jan 2023 930th MeWhenI 🇻🇦 873 72 2ms 7 May 2023 930th ListeriaM 873 72 2ms 22 Aug 2023 930th JohandeRuiter 🇳🇱 873 72 2ms 14 Sep 2024 930th larcherMTT 873 72 3ms 5 Oct 2024 930th snyderek 🇺🇸 873 72 3ms 19 Feb 2025 930th 5quiwyrm 873 72 3ms 29 Jun 2025 930th TeodorDyakov 🇧🇬 873 72 2ms 8 Jul 2025 930th xiaoyiming123 873 72 2ms 12 Jul 2025 943rd Steffan153 🇫🇮 873 83 678ms 9 Apr 2023 943rd ovs-code 🇩🇪 873 83 63ms 1 Jul 2024 945th DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 946th dieggsy 872 97 41ms 8 Oct 2024 947th ulucs 871 35 9ms 8 May 2022 947th bstrat 871 35 9ms 6 Jun 2024 947th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 950th scpchicken 🇵🇼 871 45 429ms 4 May 2022 950th SirBogman 🇺🇸 871 45 304ms 5 May 2022 952nd Andriamanitra 🇫🇮 871 54 42ms 21 Jul 2022 952nd jared-hughes 871 54 39ms 12 Sep 2022 952nd OhmNomNom 871 54 47ms 7 Oct 2022 952nd olleicua 🇺🇸 871 54 41ms 21 Jan 2024 952nd LostSyntax21 🇬🇧 871 54 41ms 12 Mar 2025 952nd AbrahamJLR 🇻🇪 871 54 40ms 4 Jun 2025 952nd vishal-mohanty 871 54 42ms 25 Aug 2025 959th MeWhenI 🇻🇦 871 85 44ms 27 Jun 2022 959th Shanethegamer 🇺🇸 871 85 42ms 15 May 2023 959th albanian-laundromat 871 85 45ms 25 Aug 2025 962nd CaedenHarper 🇨🇦 869 60 710ms 28 Sep 2025 963rd GrayJoKing 🇦🇺 869 67 80ms 8 Feb 2025 964th Steffan153 🇫🇮 869 82 1,321ms 23 Feb 2023 965th Frowny 868 38 43ms 5 May 2022 965th stackofbears 868 38 53ms 14 Mar 2025 967th steffan-polygolf 868 73 85ms 23 Feb 2023 967th MWI-polygolf 868 73 81ms 6 Dec 2023 967th HumanoidCPU 868 73 80ms 7 May 2024 970th mtirado1 868 75 8ms 13 Aug 2022 971st stefangimmillaro 868 112 259ms 26 Sep 2023 971st kkoenig 868 112 256ms 4 Jan 2024 973rd ovs-code 🇩🇪 868 133 42ms 8 Jul 2024 974th pardouin 🇫🇷 867 61 135ms 7 Aug 2024 975th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 First Prev 901–975 of 3,460 Next Last