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 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 Multitap Input 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 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 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 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 Multitap Input 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 799th HumanoidCPU 868 73 81ms 7 May 2024 802nd nwellnhof 🇩🇪 868 111 250ms 4 May 2022 802nd emplv 🇱🇻 868 111 240ms 5 May 2022 802nd Shanethegamer 🇺🇸 868 111 246ms 21 Nov 2023 805th pardouin 🇫🇷 867 61 129ms 7 Aug 2024 806th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 806th Betuaredead 867 92 468ms 5 Jan 2023 806th Yax42 🇫🇷 867 92 420ms 4 Oct 2025 809th emgordon154 867 160 1,744ms 23 days ago 809th DialFrost 🇸🇬 867 160 1,672ms 12 hours ago 811th bac0id 866 90 374ms 26 Sep 2023 811th deadp4nda 🇩🇪 866 90 390ms 26 Apr 2024 811th 123mjb 866 90 430ms 23 Jun 2025 811th michelebastione 🇮🇹 866 90 418ms 24 Aug 2025 811th razvandmtr 🇷🇴 866 90 403ms 6 Nov 2025 816th TylerBloom 866 96 115ms 22 Mar 2024 817th shellbertt 🇨🇦 866 98 61ms 9 May 2022 817th iakolzin 866 98 60ms 26 May 2022 817th Betuaredead 866 98 61ms 5 Jan 2023 817th oceko 866 98 57ms 19 Feb 2024 817th dokutan 866 98 54ms 17 Mar 2024 817th cuzdav 866 98 57ms 4 May 2025 817th timhaj 🇸🇮 866 98 54ms 12 Sep 2025 817th Yax42 🇫🇷 866 98 60ms 4 Oct 2025 825th 5quiwyrm 865 52 293ms 4 Sep 2022 825th MeWhenI 🇻🇦 865 52 301ms 28 Jan 2023 825th Feniske 🇫🇷 865 52 289ms 7 Nov 2023 825th dcgjb 865 52 294ms 29 Jan 2024 825th JPRuskin 🇬🇧 865 52 294ms 7 Apr 2025 825th IISResetMe 865 52 309ms 7 Apr 2025 825th Ripick 865 52 308ms 1 Jun 2025 832nd Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 833rd MeWhenI 🇻🇦 865 81 8ms 23 May 2023 834th typeswitch-dev 🇵🇹 864 75 5ms 22 Jul 2023 835th HPWiz 🇳🇿 863 50 247ms 4 May 2022 835th JayXon 🇺🇸 863 50 237ms 5 May 2022 835th Steffan153 🇫🇮 863 50 247ms 10 Dec 2022 835th ovs-code 🇩🇪 863 50 425ms 24 Oct 2023 835th sean-niemann 🇺🇸 863 50 271ms 12 Jul 2024 840th Setvizan 863 62 11ms 12 Jan 2023 840th GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 840th arctouch-cristiannevianna 863 62 11ms 3 Apr 2023 840th Corxldyphik 863 62 11ms 11 Apr 2023 840th Blockyheadman 863 62 12ms 1 Nov 2023 840th ollyspooner 863 62 11ms 22 Nov 2023 840th itserasmus 863 62 11ms 25 Jan 2024 840th Jacob385 863 62 10ms 13 Mar 2024 840th junkondo-jp 863 62 11ms 30 Jun 2024 840th ShiraJoseph 🇺🇸 863 62 10ms 1 Mar 2025 840th tomh1012 863 62 11ms 3 Dec 2025 851st MeWhenI 🇻🇦 863 145 1,457ms 28 Mar 2025 852nd NewDefectus 🇮🇱 862 73 3ms 6 May 2022 852nd Natanaelel 🇸🇪 862 73 3ms 15 Jun 2022 852nd LorenzoDeGaspari 862 73 2ms 27 May 2024 852nd Bpc-CPU 862 73 2ms 12 Jul 2025 852nd AZTECCO 862 73 2ms 16 Sep 2025 852nd CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 852nd prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 859th 386asm 🇺🇸 862 86 40ms 9 Apr 2023 859th DialFrost 🇸🇬 862 86 43ms 18 days ago 861st ovs-code 🇩🇪 862 161 1,719ms 14 Sep 2025 861st Yewzir 🇧🇪 862 161 2,399ms 14 Nov 2025 863rd Shanethegamer 🇺🇸 861 58 767ms 17 Sep 2025 864th Shanethegamer 🇺🇸 861 70 99ms 12 Dec 2022 864th Alessandro-Balconi 🇮🇹 861 70 95ms 26 Dec 2022 866th dokutan 861 79 11ms 27 Apr 2024 867th Liibe 860 97 391ms 25 Sep 2025 868th stefangimmillaro 860 112 238ms 26 Sep 2023 868th kkoenig 860 112 247ms 4 Jan 2024 870th o0lit3 🇺🇸 859 54 7ms 22 Jun 2023 870th Natanaelel 🇸🇪 859 54 7ms 10 Feb 2025 872nd scpchicken 🇵🇼 859 72 19ms 4 May 2022 872nd sultan 859 72 17ms 6 Jun 2022 872nd annaproxy 859 72 20ms 22 Aug 2022 872nd BlankSpruce 859 72 23ms 9 Sep 2022 872nd ValentinCassayre 859 72 21ms 8 Oct 2022 872nd mathb0y512 859 72 21ms 1 Dec 2022 872nd NoahBolohan 🇨🇦 859 72 21ms 28 Feb 2023 872nd neel11235813 859 72 21ms 8 Mar 2023 872nd Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 First Prev 801–880 of 3,531 Next Last