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 795th vishal-mohanty 872 54 40ms 25 Aug 2025 802nd Shanethegamer 🇺🇸 872 85 38ms 15 May 2023 802nd albanian-laundromat 872 85 40ms 25 Aug 2025 804th dieggsy 872 97 28ms 8 Oct 2024 805th ulucs 871 35 9ms 8 May 2022 805th bstrat 871 35 8ms 6 Jun 2024 805th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 808th scpchicken 🇵🇼 871 45 358ms 4 May 2022 808th SirBogman 🇺🇸 871 45 227ms 5 May 2022 810th TFeld00 🇩🇰 871 71 25ms 17 May 2022 810th DialFrost 🇸🇬 871 71 25ms 15 Nov 2022 810th StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 810th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 810th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 810th anter69 🇭🇺 871 71 18ms 21 May 2024 810th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 810th lelbal 871 71 20ms 26 Aug 2025 810th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 810th 09cf 871 71 18ms 18 Nov 2025 810th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 810th Flekay 🇩🇪 871 71 17ms 12 Feb 2026 810th snoozingnewt 🇨🇦 871 71 18ms 13 Feb 2026 810th JOrE20 871 71 16ms 20 days ago 824th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 825th emgordon154 870 160 1,606ms 24 Dec 2025 825th DialFrost 🇸🇬 870 160 1,779ms 17 Jan 2026 827th Steffan153 🇫🇮 869 82 1,425ms 23 Feb 2023 828th 123mjb 869 96 366ms 20 Nov 2025 828th noescareno 869 96 366ms 21 Nov 2025 830th Frowny 868 38 40ms 5 May 2022 830th stackofbears 868 38 42ms 14 Mar 2025 832nd steffan-polygolf 868 73 90ms 23 Feb 2023 832nd MWI-polygolf 868 73 84ms 6 Dec 2023 832nd HumanoidCPU 868 73 83ms 7 May 2024 835th nwellnhof 🇩🇪 868 111 301ms 4 May 2022 835th emplv 🇱🇻 868 111 294ms 5 May 2022 835th Shanethegamer 🇺🇸 868 111 293ms 21 Nov 2023 838th pardouin 🇫🇷 867 61 211ms 7 Aug 2024 839th MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 839th Betuaredead 867 92 480ms 5 Jan 2023 839th Yax42 🇫🇷 867 92 470ms 4 Oct 2025 842nd shellbertt 🇨🇦 867 98 62ms 9 May 2022 842nd iakolzin 867 98 61ms 26 May 2022 842nd Betuaredead 867 98 61ms 5 Jan 2023 842nd oceko 867 98 62ms 19 Feb 2024 842nd cuzdav 867 98 61ms 4 May 2025 842nd timhaj 🇸🇮 867 98 65ms 12 Sep 2025 842nd Yax42 🇫🇷 867 98 61ms 4 Oct 2025 849th 5quiwyrm 866 52 329ms 4 Sep 2022 849th MeWhenI 🇻🇦 866 52 296ms 28 Jan 2023 849th Feniske 🇫🇷 866 52 314ms 7 Nov 2023 849th dcgjb 866 52 292ms 29 Jan 2024 849th JPRuskin 🇬🇧 866 52 305ms 7 Apr 2025 849th IISResetMe 866 52 322ms 7 Apr 2025 849th Ripick 866 52 270ms 1 Jun 2025 849th madex 🇩🇪 866 52 271ms 22 hours ago 857th bac0id 866 90 388ms 26 Sep 2023 857th deadp4nda 🇩🇪 866 90 385ms 26 Apr 2024 857th 123mjb 866 90 367ms 23 Jun 2025 857th michelebastione 🇮🇹 866 90 447ms 24 Aug 2025 857th razvandmtr 🇷🇴 866 90 400ms 6 Nov 2025 862nd TylerBloom 866 96 125ms 22 Mar 2024 863rd Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 864th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 865th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 866th dokutan 864 79 10ms 27 Apr 2024 866th SwordF-Official 🇺🇸 864 79 10ms 1 Feb 2026 868th ovs-code 🇩🇪 864 85 16ms 11 Dec 2023 869th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 869th Yewzir 🇧🇪 864 161 1,887ms 14 Nov 2025 871st HPWiz 🇳🇿 863 50 265ms 4 May 2022 871st JayXon 🇺🇸 863 50 250ms 5 May 2022 871st Steffan153 🇫🇮 863 50 256ms 10 Dec 2022 871st ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 871st sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 876th DialFrost 🇸🇬 863 56 1,180ms 1 Sep 2025 876th GolfingSuccess 🇬🇷 863 56 905ms 17 Feb 2026 878th Setvizan 863 62 12ms 12 Jan 2023 878th GreenBeansAgainstVeganism 863 62 16ms 13 Jan 2023 878th arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 First Prev 801–880 of 3,638 Next Last