Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar 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 Multitap Input 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 Tower of Hanoi 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 Connect Four Continued Fractions 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Multitap Input 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 Tower of Hanoi 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 Connect Four Continued Fractions 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 798th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 798th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 798th anter69 🇭🇺 871 71 18ms 21 May 2024 798th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 798th lelbal 871 71 20ms 26 Aug 2025 798th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 798th 09cf 871 71 18ms 18 Nov 2025 798th Languag3 871 71 25ms 5 Dec 2025 798th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 798th Flekay 🇩🇪 871 71 17ms 12 days ago 798th snoozingnewt 🇨🇦 871 71 18ms 12 days ago 812th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 813th emgordon154 870 160 1,606ms 24 Dec 2025 813th DialFrost 🇸🇬 870 160 1,669ms 17 Jan 2026 815th Steffan153 🇫🇮 869 82 1,388ms 23 Feb 2023 816th 123mjb 869 96 366ms 20 Nov 2025 816th noescareno 869 96 366ms 21 Nov 2025 818th Shanethegamer 🇺🇸 869 98 127ms 15 Apr 2025 818th GolfingSuccess 🇬🇷 869 98 104ms 28 Nov 2025 818th DialFrost 🇸🇬 869 98 102ms 1 Dec 2025 821st Frowny 868 38 40ms 5 May 2022 821st stackofbears 868 38 42ms 14 Mar 2025 823rd steffan-polygolf 868 73 87ms 23 Feb 2023 823rd MWI-polygolf 868 73 83ms 6 Dec 2023 823rd HumanoidCPU 868 73 81ms 7 May 2024 826th nwellnhof 🇩🇪 868 111 285ms 4 May 2022 826th emplv 🇱🇻 868 111 279ms 5 May 2022 826th Shanethegamer 🇺🇸 868 111 287ms 21 Nov 2023 829th pardouin 🇫🇷 867 61 130ms 7 Aug 2024 830th MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 830th Betuaredead 867 92 480ms 5 Jan 2023 830th Yax42 🇫🇷 867 92 470ms 4 Oct 2025 833rd shellbertt 🇨🇦 867 98 62ms 9 May 2022 833rd iakolzin 867 98 65ms 26 May 2022 833rd Betuaredead 867 98 65ms 5 Jan 2023 833rd oceko 867 98 62ms 19 Feb 2024 833rd cuzdav 867 98 58ms 4 May 2025 833rd timhaj 🇸🇮 867 98 56ms 12 Sep 2025 833rd Yax42 🇫🇷 867 98 58ms 4 Oct 2025 840th bac0id 866 90 374ms 26 Sep 2023 840th deadp4nda 🇩🇪 866 90 390ms 26 Apr 2024 840th 123mjb 866 90 349ms 23 Jun 2025 840th michelebastione 🇮🇹 866 90 407ms 24 Aug 2025 840th razvandmtr 🇷🇴 866 90 403ms 6 Nov 2025 845th TylerBloom 866 96 119ms 22 Mar 2024 846th 5quiwyrm 865 52 293ms 4 Sep 2022 846th MeWhenI 🇻🇦 865 52 301ms 28 Jan 2023 846th Feniske 🇫🇷 865 52 289ms 7 Nov 2023 846th dcgjb 865 52 277ms 29 Jan 2024 846th JPRuskin 🇬🇧 865 52 284ms 7 Apr 2025 846th IISResetMe 865 52 309ms 7 Apr 2025 846th Ripick 865 52 303ms 1 Jun 2025 853rd Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 854th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 855th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 856th dokutan 864 79 10ms 27 Apr 2024 856th SwordF-Official 🇺🇸 864 79 10ms 24 days ago 858th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 858th Yewzir 🇧🇪 864 161 1,887ms 14 Nov 2025 860th HPWiz 🇳🇿 863 50 265ms 4 May 2022 860th JayXon 🇺🇸 863 50 250ms 5 May 2022 860th Steffan153 🇫🇮 863 50 256ms 10 Dec 2022 860th ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 860th sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 865th Setvizan 863 62 11ms 12 Jan 2023 865th GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 865th arctouch-cristiannevianna 863 62 14ms 3 Apr 2023 865th Corxldyphik 863 62 11ms 11 Apr 2023 865th Blockyheadman 863 62 12ms 1 Nov 2023 865th ollyspooner 863 62 10ms 22 Nov 2023 865th itserasmus 863 62 11ms 25 Jan 2024 865th Jacob385 863 62 11ms 13 Mar 2024 865th junkondo-jp 863 62 10ms 30 Jun 2024 865th ShiraJoseph 🇺🇸 863 62 14ms 1 Mar 2025 865th tomh1012 863 62 12ms 3 Dec 2025 876th MeWhenI 🇻🇦 863 145 1,413ms 28 Mar 2025 877th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 877th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 877th LorenzoDeGaspari 862 73 2ms 27 May 2024 877th Bpc-CPU 862 73 2ms 12 Jul 2025 First Prev 801–880 of 3,598 Next Last