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 241st JayXon 🇺🇸 928 57 133ms 19 Aug 2024 242nd sisyphus-ppcg 🇦🇺 928 65 106ms 19 Dec 2025 242nd ovs-code 🇩🇪 928 65 123ms 19 Dec 2025 244th roavin 928 84 407ms 23 Jun 2022 244th tkr-sh 🇰🇵 928 84 407ms 20 Aug 2022 244th Nickmiste 928 84 385ms 9 Nov 2022 244th Matgc04 928 84 368ms 19 May 2023 244th postie77 928 84 404ms 19 May 2023 244th ertz1ertz 928 84 416ms 13 Sep 2024 244th Grabnukebomb 928 84 391ms 13 Sep 2024 244th Shanethegamer 🇺🇸 928 84 425ms 9 Apr 2025 244th HumanoidCPU 928 84 423ms 10 Apr 2025 244th annaproxy 928 84 406ms 11 Apr 2025 244th Re-Adventures 🇮🇳 928 84 402ms 15 Apr 2025 244th janbehrens 🇩🇪 928 84 417ms 17 Apr 2025 244th Flix7dev 🇧🇪 928 84 385ms 21 Oct 2025 257th h3ra993huskp 🇯🇵 927 90 440ms 30 Nov 2025 258th KasperKivimaeki 🇫🇮 927 104 238ms 10 Dec 2025 259th edsrzf 🇳🇿 925 54 817ms 13 Sep 2025 259th CaedenHarper 🇨🇦 925 54 826ms 27 Sep 2025 259th sean-niemann 🇺🇸 925 54 833ms 27 Sep 2025 259th albanian-laundromat 925 54 859ms 14 Nov 2025 259th xsot 🇸🇬 925 54 873ms 15 Nov 2025 264th btnlq 924 59 6ms 6 Nov 2022 264th DialFrost 🇸🇬 924 59 6ms 23 Dec 2025 266th Lydxn 🇨🇦 924 90 124ms 6 May 2022 267th Bubbler-4 923 33 2,528ms 6 May 2022 267th rak1507 🇬🇧 923 33 108ms 8 May 2022 267th ngn 🇧🇬 923 33 25ms 11 May 2022 267th zacjl 923 33 32ms 3 Jun 2025 267th GrayJoKing 🇦🇺 923 33 13ms 4 Jun 2025 267th HPWiz 🇳🇿 923 33 9ms 16 Nov 2025 273rd nwellnhof 🇩🇪 923 51 35ms 4 May 2022 273rd primo-ppcg 🇹🇭 923 51 38ms 6 May 2022 273rd janlelis 923 51 36ms 10 May 2022 273rd Natanaelel 🇸🇪 923 51 39ms 2 Jun 2022 277th uiamn 923 58 13ms 6 Sep 2022 277th 5quiwyrm 923 58 13ms 29 Sep 2022 277th alasdair-greenland 923 58 12ms 13 Jan 2023 277th kirjavascript 923 58 11ms 4 Aug 2025 277th Posandu 923 58 11ms 26 Aug 2025 277th mrxz 🇳🇱 923 58 17ms 3 Sep 2025 283rd MichalMarsalek 🇨🇿 923 71 143ms 5 May 2022 283rd Lydxn 🇨🇦 923 71 174ms 7 May 2022 283rd GrayJoKing 🇦🇺 923 71 122ms 8 May 2022 283rd JayXon 🇺🇸 923 71 121ms 8 May 2022 283rd Steffan153 🇫🇮 923 71 133ms 9 Mar 2023 283rd Shanethegamer 🇺🇸 923 71 131ms 15 May 2023 283rd MeWhenI 🇻🇦 923 71 128ms 8 Aug 2023 283rd sean-niemann 🇺🇸 923 71 127ms 9 Jan 2025 291st Steffan153 🇫🇮 922 76 11ms 15 May 2023 291st primo-ppcg 🇹🇭 922 76 17ms 15 May 2023 291st Lydxn 🇨🇦 922 76 8ms 22 May 2023 291st GrayJoKing 🇦🇺 922 76 13ms 24 Aug 2023 295th Herbert00709 🇵🇱 922 92 59ms 17 Nov 2023 295th 4QT0R 922 92 53ms 23 Nov 2023 295th ovs-code 🇩🇪 922 92 58ms 3 Jun 2024 298th xnor-gate 920 63 187ms 20 Jan 2025 299th pardouin 🇫🇷 919 72 2,447ms 21 May 2025 300th GrayJoKing 🇦🇺 919 74 4ms 23 Dec 2025 300th FlyingPenguin223 919 74 6ms 23 days ago 302nd primo-ppcg 🇹🇭 918 61 7ms 6 May 2022 302nd sisyphus-ppcg 🇦🇺 918 61 10ms 14 Jul 2022 304th Lydxn 🇨🇦 918 70 100ms 7 May 2022 304th JayXon 🇺🇸 918 70 104ms 7 May 2022 306th JayXon 🇺🇸 918 79 728ms 5 Apr 2023 306th Lydxn 🇨🇦 918 79 656ms 9 Apr 2023 308th JayXon 🇺🇸 918 105 248ms 4 Oct 2025 309th Steffan153 🇫🇮 917 71 117ms 14 Oct 2022 309th Shanethegamer 🇺🇸 917 71 106ms 15 Oct 2022 309th stefangimmillaro 917 71 118ms 16 Oct 2022 309th MeWhenI 🇻🇦 917 71 112ms 16 Oct 2022 313th annaproxy 917 79 111ms 24 Aug 2022 313th GrayJoKing 🇦🇺 917 79 83ms 28 Aug 2022 313th IanUtley 917 79 114ms 3 Nov 2023 313th Kacarott 🇦🇺 917 79 117ms 13 Jun 2024 317th Steffan153 🇫🇮 917 81 25ms 11 Dec 2023 318th arctouch-cristiannevianna 917 85 391ms 3 Apr 2023 318th tomtheisen 🇺🇸 917 85 422ms 10 Apr 2025 320th Shanethegamer 🇺🇸 917 87 390ms 15 May 2023 First Prev 241–320 of 3,535 Next Last