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 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 Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 800th bstrat 871 35 8ms 6 Jun 2024 800th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 803rd scpchicken 🇵🇼 871 45 358ms 4 May 2022 803rd SirBogman 🇺🇸 871 45 227ms 5 May 2022 805th TFeld00 🇩🇰 871 71 25ms 17 May 2022 805th DialFrost 🇸🇬 871 71 25ms 15 Nov 2022 805th StefanHabel 🇨🇦 871 71 19ms 29 Nov 2022 805th nstearns96 🇬🇧 871 71 21ms 11 Jan 2023 805th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 805th anter69 🇭🇺 871 71 18ms 21 May 2024 805th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 805th lelbal 871 71 20ms 26 Aug 2025 805th HETHAT 🇩🇿 871 71 23ms 23 Sep 2025 805th 09cf 871 71 18ms 18 Nov 2025 805th CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 805th Flekay 🇩🇪 871 71 17ms 26 days ago 805th snoozingnewt 🇨🇦 871 71 18ms 25 days ago 805th JOrE20 871 71 16ms 13 days ago 819th Shanethegamer 🇺🇸 871 98 110ms 15 Apr 2025 819th GolfingSuccess 🇬🇷 871 98 102ms 28 Nov 2025 819th DialFrost 🇸🇬 871 98 117ms 1 Dec 2025 822nd ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 823rd emgordon154 870 160 1,606ms 24 Dec 2025 823rd DialFrost 🇸🇬 870 160 1,779ms 17 Jan 2026 825th Steffan153 🇫🇮 869 82 1,388ms 23 Feb 2023 826th 123mjb 869 96 366ms 20 Nov 2025 826th noescareno 869 96 366ms 21 Nov 2025 828th Frowny 868 38 40ms 5 May 2022 828th stackofbears 868 38 42ms 14 Mar 2025 830th steffan-polygolf 868 73 90ms 23 Feb 2023 830th MWI-polygolf 868 73 84ms 6 Dec 2023 830th HumanoidCPU 868 73 83ms 7 May 2024 833rd nwellnhof 🇩🇪 868 111 301ms 4 May 2022 833rd emplv 🇱🇻 868 111 294ms 5 May 2022 833rd Shanethegamer 🇺🇸 868 111 293ms 21 Nov 2023 836th pardouin 🇫🇷 867 61 148ms 7 Aug 2024 837th MeWhenI 🇻🇦 867 92 467ms 10 Oct 2022 837th Betuaredead 867 92 480ms 5 Jan 2023 837th Yax42 🇫🇷 867 92 470ms 4 Oct 2025 840th shellbertt 🇨🇦 867 98 58ms 9 May 2022 840th iakolzin 867 98 55ms 26 May 2022 840th Betuaredead 867 98 57ms 5 Jan 2023 840th oceko 867 98 59ms 19 Feb 2024 840th cuzdav 867 98 57ms 4 May 2025 840th timhaj 🇸🇮 867 98 56ms 12 Sep 2025 840th Yax42 🇫🇷 867 98 57ms 4 Oct 2025 847th bac0id 866 90 374ms 26 Sep 2023 847th deadp4nda 🇩🇪 866 90 390ms 26 Apr 2024 847th 123mjb 866 90 349ms 23 Jun 2025 847th michelebastione 🇮🇹 866 90 407ms 24 Aug 2025 847th razvandmtr 🇷🇴 866 90 403ms 6 Nov 2025 852nd TylerBloom 866 96 125ms 22 Mar 2024 853rd 5quiwyrm 865 52 293ms 4 Sep 2022 853rd MeWhenI 🇻🇦 865 52 301ms 28 Jan 2023 853rd Feniske 🇫🇷 865 52 289ms 7 Nov 2023 853rd dcgjb 865 52 277ms 29 Jan 2024 853rd JPRuskin 🇬🇧 865 52 284ms 7 Apr 2025 853rd IISResetMe 865 52 309ms 7 Apr 2025 853rd Ripick 865 52 303ms 1 Jun 2025 860th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 861st MeWhenI 🇻🇦 865 81 8ms 23 May 2023 862nd typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 863rd dokutan 864 79 10ms 27 Apr 2024 863rd SwordF-Official 🇺🇸 864 79 10ms 1 Feb 2026 865th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 865th Yewzir 🇧🇪 864 161 1,887ms 14 Nov 2025 867th HPWiz 🇳🇿 863 50 265ms 4 May 2022 867th JayXon 🇺🇸 863 50 250ms 5 May 2022 867th Steffan153 🇫🇮 863 50 256ms 10 Dec 2022 867th ovs-code 🇩🇪 863 50 403ms 24 Oct 2023 867th sean-niemann 🇺🇸 863 50 268ms 12 Jul 2024 872nd Setvizan 863 62 11ms 12 Jan 2023 872nd GreenBeansAgainstVeganism 863 62 12ms 13 Jan 2023 872nd arctouch-cristiannevianna 863 62 11ms 3 Apr 2023 872nd Corxldyphik 863 62 11ms 11 Apr 2023 872nd Blockyheadman 863 62 11ms 1 Nov 2023 872nd ollyspooner 863 62 11ms 22 Nov 2023 872nd itserasmus 863 62 11ms 25 Jan 2024 872nd Jacob385 863 62 12ms 13 Mar 2024 872nd junkondo-jp 863 62 10ms 30 Jun 2024 First Prev 801–880 of 3,617 Next Last