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 ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 789th Flekay 🇩🇪 871 71 17ms 4 days ago 789th snoozingnewt 🇨🇦 871 71 18ms 4 days ago 803rd ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 804th emgordon154 870 160 1,606ms 24 Dec 2025 804th DialFrost 🇸🇬 870 160 1,669ms 17 Jan 2026 806th Steffan153 🇫🇮 869 82 1,388ms 23 Feb 2023 807th 123mjb 869 96 366ms 20 Nov 2025 807th noescareno 869 96 366ms 21 Nov 2025 809th Shanethegamer 🇺🇸 869 98 127ms 15 Apr 2025 809th GolfingSuccess 🇬🇷 869 98 104ms 28 Nov 2025 809th DialFrost 🇸🇬 869 98 109ms 1 Dec 2025 812th Frowny 868 38 40ms 5 May 2022 812th stackofbears 868 38 42ms 14 Mar 2025 814th steffan-polygolf 868 73 87ms 23 Feb 2023 814th MWI-polygolf 868 73 83ms 6 Dec 2023 814th HumanoidCPU 868 73 81ms 7 May 2024 817th nwellnhof 🇩🇪 868 111 285ms 4 May 2022 817th emplv 🇱🇻 868 111 279ms 5 May 2022 817th Shanethegamer 🇺🇸 868 111 287ms 21 Nov 2023 820th pardouin 🇫🇷 867 61 130ms 7 Aug 2024 821st MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 821st Betuaredead 867 92 482ms 5 Jan 2023 821st Yax42 🇫🇷 867 92 509ms 4 Oct 2025 824th bac0id 866 90 374ms 26 Sep 2023 824th deadp4nda 🇩🇪 866 90 390ms 26 Apr 2024 824th 123mjb 866 90 430ms 23 Jun 2025 824th michelebastione 🇮🇹 866 90 407ms 24 Aug 2025 824th razvandmtr 🇷🇴 866 90 403ms 6 Nov 2025 829th TylerBloom 866 96 119ms 22 Mar 2024 830th shellbertt 🇨🇦 866 98 61ms 9 May 2022 830th iakolzin 866 98 60ms 26 May 2022 830th Betuaredead 866 98 61ms 5 Jan 2023 830th oceko 866 98 57ms 19 Feb 2024 830th cuzdav 866 98 57ms 4 May 2025 830th timhaj 🇸🇮 866 98 54ms 12 Sep 2025 830th Yax42 🇫🇷 866 98 60ms 4 Oct 2025 837th 5quiwyrm 865 52 293ms 4 Sep 2022 837th MeWhenI 🇻🇦 865 52 301ms 28 Jan 2023 837th Feniske 🇫🇷 865 52 289ms 7 Nov 2023 837th dcgjb 865 52 294ms 29 Jan 2024 837th JPRuskin 🇬🇧 865 52 294ms 7 Apr 2025 837th IISResetMe 865 52 309ms 7 Apr 2025 837th Ripick 865 52 308ms 1 Jun 2025 844th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 845th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 846th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 847th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 847th Yewzir 🇧🇪 864 161 2,399ms 14 Nov 2025 849th HPWiz 🇳🇿 863 50 265ms 4 May 2022 849th JayXon 🇺🇸 863 50 279ms 5 May 2022 849th Steffan153 🇫🇮 863 50 256ms 10 Dec 2022 849th ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 849th sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 854th Setvizan 863 62 11ms 12 Jan 2023 854th GreenBeansAgainstVeganism 863 62 12ms 13 Jan 2023 854th arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 854th Corxldyphik 863 62 12ms 11 Apr 2023 854th Blockyheadman 863 62 12ms 1 Nov 2023 854th ollyspooner 863 62 11ms 22 Nov 2023 854th itserasmus 863 62 11ms 25 Jan 2024 854th Jacob385 863 62 12ms 13 Mar 2024 854th junkondo-jp 863 62 10ms 30 Jun 2024 854th ShiraJoseph 🇺🇸 863 62 10ms 1 Mar 2025 854th tomh1012 863 62 11ms 3 Dec 2025 865th dokutan 863 79 11ms 27 Apr 2024 865th SwordF-Official 🇺🇸 863 79 10ms 16 days ago 867th MeWhenI 🇻🇦 863 145 1,413ms 28 Mar 2025 868th NewDefectus 🇮🇱 862 73 3ms 6 May 2022 868th Natanaelel 🇸🇪 862 73 3ms 15 Jun 2022 868th LorenzoDeGaspari 862 73 2ms 27 May 2024 868th Bpc-CPU 862 73 2ms 12 Jul 2025 868th AZTECCO 862 73 2ms 16 Sep 2025 868th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 868th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 868th albanian-laundromat 862 73 3ms 20 Jan 2026 876th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 876th DialFrost 🇸🇬 862 86 43ms 30 Dec 2025 878th Shanethegamer 🇺🇸 861 70 99ms 12 Dec 2022 878th Alessandro-Balconi 🇮🇹 861 70 95ms 26 Dec 2022 880th o0lit3 🇺🇸 860 54 7ms 22 Jun 2023 First Prev 801–880 of 3,579 Next Last