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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill 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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 801st ulucs 871 35 9ms 8 May 2022 801st bstrat 871 35 8ms 6 Jun 2024 801st wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 804th scpchicken 🇵🇼 871 45 358ms 4 May 2022 804th SirBogman 🇺🇸 871 45 227ms 5 May 2022 806th TFeld00 🇩🇰 871 71 25ms 17 May 2022 806th DialFrost 🇸🇬 871 71 25ms 15 Nov 2022 806th StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 806th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 806th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 806th anter69 🇭🇺 871 71 18ms 21 May 2024 806th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 806th lelbal 871 71 20ms 26 Aug 2025 806th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 806th 09cf 871 71 18ms 18 Nov 2025 806th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 806th Flekay 🇩🇪 871 71 17ms 12 Feb 2026 806th snoozingnewt 🇨🇦 871 71 18ms 13 Feb 2026 806th JOrE20 871 71 16ms 19 days ago 820th Shanethegamer 🇺🇸 871 98 110ms 15 Apr 2025 820th GolfingSuccess 🇬🇷 871 98 102ms 28 Nov 2025 820th DialFrost 🇸🇬 871 98 117ms 1 Dec 2025 823rd ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 824th emgordon154 870 160 1,606ms 24 Dec 2025 824th DialFrost 🇸🇬 870 160 1,779ms 17 Jan 2026 826th Steffan153 🇫🇮 869 82 1,425ms 23 Feb 2023 827th 123mjb 869 96 366ms 20 Nov 2025 827th noescareno 869 96 366ms 21 Nov 2025 829th Frowny 868 38 40ms 5 May 2022 829th stackofbears 868 38 42ms 14 Mar 2025 831st steffan-polygolf 868 73 90ms 23 Feb 2023 831st MWI-polygolf 868 73 84ms 6 Dec 2023 831st HumanoidCPU 868 73 83ms 7 May 2024 834th nwellnhof 🇩🇪 868 111 301ms 4 May 2022 834th emplv 🇱🇻 868 111 294ms 5 May 2022 834th Shanethegamer 🇺🇸 868 111 293ms 21 Nov 2023 837th pardouin 🇫🇷 867 61 211ms 7 Aug 2024 838th MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 838th Betuaredead 867 92 480ms 5 Jan 2023 838th Yax42 🇫🇷 867 92 470ms 4 Oct 2025 841st shellbertt 🇨🇦 867 98 62ms 9 May 2022 841st iakolzin 867 98 61ms 26 May 2022 841st Betuaredead 867 98 61ms 5 Jan 2023 841st oceko 867 98 62ms 19 Feb 2024 841st cuzdav 867 98 61ms 4 May 2025 841st timhaj 🇸🇮 867 98 65ms 12 Sep 2025 841st Yax42 🇫🇷 867 98 61ms 4 Oct 2025 848th 5quiwyrm 866 52 329ms 4 Sep 2022 848th MeWhenI 🇻🇦 866 52 296ms 28 Jan 2023 848th Feniske 🇫🇷 866 52 314ms 7 Nov 2023 848th dcgjb 866 52 292ms 29 Jan 2024 848th JPRuskin 🇬🇧 866 52 305ms 7 Apr 2025 848th IISResetMe 866 52 322ms 7 Apr 2025 848th Ripick 866 52 270ms 1 Jun 2025 848th madex 🇩🇪 866 52 271ms 4 hours ago 856th bac0id 866 90 388ms 26 Sep 2023 856th deadp4nda 🇩🇪 866 90 385ms 26 Apr 2024 856th 123mjb 866 90 367ms 23 Jun 2025 856th michelebastione 🇮🇹 866 90 447ms 24 Aug 2025 856th razvandmtr 🇷🇴 866 90 400ms 6 Nov 2025 861st TylerBloom 866 96 125ms 22 Mar 2024 862nd Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 863rd MeWhenI 🇻🇦 865 81 8ms 23 May 2023 864th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 865th dokutan 864 79 10ms 27 Apr 2024 865th SwordF-Official 🇺🇸 864 79 10ms 1 Feb 2026 867th ovs-code 🇩🇪 864 85 15ms 11 Dec 2023 868th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 868th Yewzir 🇧🇪 864 161 1,887ms 14 Nov 2025 870th HPWiz 🇳🇿 863 50 265ms 4 May 2022 870th JayXon 🇺🇸 863 50 250ms 5 May 2022 870th Steffan153 🇫🇮 863 50 256ms 10 Dec 2022 870th ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 870th sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 875th Setvizan 863 62 12ms 12 Jan 2023 875th GreenBeansAgainstVeganism 863 62 16ms 13 Jan 2023 875th arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 875th Corxldyphik 863 62 12ms 11 Apr 2023 875th Blockyheadman 863 62 11ms 1 Nov 2023 875th ollyspooner 863 62 12ms 22 Nov 2023 First Prev 801–880 of 3,627 Next Last