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 801st Shanethegamer 🇺🇸 869 98 127ms 15 Apr 2025 801st GolfingSuccess 🇬🇷 869 98 104ms 28 Nov 2025 801st DialFrost 🇸🇬 869 98 110ms 1 Dec 2025 804th Frowny 868 38 40ms 5 May 2022 804th stackofbears 868 38 42ms 14 Mar 2025 806th steffan-polygolf 868 73 87ms 23 Feb 2023 806th MWI-polygolf 868 73 83ms 6 Dec 2023 806th HumanoidCPU 868 73 81ms 7 May 2024 809th nwellnhof 🇩🇪 868 111 268ms 4 May 2022 809th emplv 🇱🇻 868 111 289ms 5 May 2022 809th Shanethegamer 🇺🇸 868 111 255ms 21 Nov 2023 812th pardouin 🇫🇷 867 61 130ms 7 Aug 2024 813th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 813th Betuaredead 867 92 468ms 5 Jan 2023 813th Yax42 🇫🇷 867 92 420ms 4 Oct 2025 816th bac0id 866 90 374ms 26 Sep 2023 816th deadp4nda 🇩🇪 866 90 390ms 26 Apr 2024 816th 123mjb 866 90 430ms 23 Jun 2025 816th michelebastione 🇮🇹 866 90 407ms 24 Aug 2025 816th razvandmtr 🇷🇴 866 90 403ms 6 Nov 2025 821st TylerBloom 866 96 120ms 22 Mar 2024 822nd shellbertt 🇨🇦 866 98 61ms 9 May 2022 822nd iakolzin 866 98 60ms 26 May 2022 822nd Betuaredead 866 98 61ms 5 Jan 2023 822nd oceko 866 98 57ms 19 Feb 2024 822nd dokutan 866 98 54ms 17 Mar 2024 822nd cuzdav 866 98 57ms 4 May 2025 822nd timhaj 🇸🇮 866 98 54ms 12 Sep 2025 822nd Yax42 🇫🇷 866 98 60ms 4 Oct 2025 830th 5quiwyrm 865 52 293ms 4 Sep 2022 830th MeWhenI 🇻🇦 865 52 301ms 28 Jan 2023 830th Feniske 🇫🇷 865 52 289ms 7 Nov 2023 830th dcgjb 865 52 294ms 29 Jan 2024 830th JPRuskin 🇬🇧 865 52 294ms 7 Apr 2025 830th IISResetMe 865 52 309ms 7 Apr 2025 830th Ripick 865 52 308ms 1 Jun 2025 837th Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 838th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 839th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 840th ovs-code 🇩🇪 864 161 1,719ms 14 Sep 2025 840th Yewzir 🇧🇪 864 161 2,399ms 14 Nov 2025 842nd HPWiz 🇳🇿 863 50 247ms 4 May 2022 842nd JayXon 🇺🇸 863 50 237ms 5 May 2022 842nd Steffan153 🇫🇮 863 50 247ms 10 Dec 2022 842nd ovs-code 🇩🇪 863 50 425ms 24 Oct 2023 842nd sean-niemann 🇺🇸 863 50 271ms 12 Jul 2024 847th Setvizan 863 62 11ms 12 Jan 2023 847th GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 847th arctouch-cristiannevianna 863 62 11ms 3 Apr 2023 847th Corxldyphik 863 62 11ms 11 Apr 2023 847th Blockyheadman 863 62 12ms 1 Nov 2023 847th ollyspooner 863 62 11ms 22 Nov 2023 847th itserasmus 863 62 11ms 25 Jan 2024 847th Jacob385 863 62 10ms 13 Mar 2024 847th junkondo-jp 863 62 11ms 30 Jun 2024 847th ShiraJoseph 🇺🇸 863 62 10ms 1 Mar 2025 847th tomh1012 863 62 11ms 3 Dec 2025 858th dokutan 863 79 11ms 27 Apr 2024 858th SwordF-Official 863 79 10ms 6 days ago 858th frosster 863 79 10ms 7 hours ago 861st MeWhenI 🇻🇦 863 145 1,432ms 28 Mar 2025 862nd NewDefectus 🇮🇱 862 73 3ms 6 May 2022 862nd Natanaelel 🇸🇪 862 73 3ms 15 Jun 2022 862nd LorenzoDeGaspari 862 73 2ms 27 May 2024 862nd Bpc-CPU 862 73 2ms 12 Jul 2025 862nd AZTECCO 862 73 2ms 16 Sep 2025 862nd CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 862nd prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 862nd albanian-laundromat 862 73 3ms 18 days ago 870th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 870th DialFrost 🇸🇬 862 86 43ms 30 Dec 2025 872nd Shanethegamer 🇺🇸 861 58 1,035ms 17 Sep 2025 873rd Shanethegamer 🇺🇸 861 70 99ms 12 Dec 2022 873rd Alessandro-Balconi 🇮🇹 861 70 95ms 26 Dec 2022 875th o0lit3 🇺🇸 860 54 7ms 22 Jun 2023 875th Natanaelel 🇸🇪 860 54 7ms 10 Feb 2025 877th Liibe 860 97 477ms 25 Sep 2025 878th stefangimmillaro 860 112 297ms 26 Sep 2023 878th kkoenig 860 112 283ms 4 Jan 2024 880th scpchicken 🇵🇼 859 72 20ms 4 May 2022 First Prev 801–880 of 3,568 Next Last