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 ><> 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 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 240th JayXon 🇺🇸 929 67 37ms 19 Aug 2024 242nd sisyphus-ppcg 🇦🇺 928 50 2,414ms 31 Jan 2023 242nd saito-ta 🇯🇵 928 50 759ms 12 Dec 2024 244th JayXon 🇺🇸 928 57 145ms 19 Aug 2024 245th sisyphus-ppcg 🇦🇺 928 65 106ms 19 Dec 2025 245th ovs-code 🇩🇪 928 65 123ms 19 Dec 2025 247th roavin 928 84 379ms 23 Jun 2022 247th tkr-sh 🇰🇵 928 84 402ms 20 Aug 2022 247th Nickmiste 928 84 385ms 9 Nov 2022 247th Matgc04 928 84 368ms 19 May 2023 247th postie77 928 84 400ms 19 May 2023 247th ertz1ertz 928 84 414ms 13 Sep 2024 247th Grabnukebomb 928 84 391ms 13 Sep 2024 247th Shanethegamer 🇺🇸 928 84 425ms 9 Apr 2025 247th HumanoidCPU 928 84 423ms 10 Apr 2025 247th annaproxy 928 84 406ms 11 Apr 2025 247th Re-Adventures 🇮🇳 928 84 402ms 15 Apr 2025 247th janbehrens 🇩🇪 928 84 417ms 17 Apr 2025 247th Flix7dev 🇧🇪 928 84 385ms 21 Oct 2025 260th Steffan153 🇫🇮 927 53 892ms 11 days ago 261st h3ra993huskp 🇯🇵 927 90 425ms 30 Nov 2025 262nd KasperKivimaeki 🇫🇮 927 104 293ms 10 Dec 2025 263rd btnlq 924 59 5ms 6 Nov 2022 263rd DialFrost 🇸🇬 924 59 5ms 23 Dec 2025 265th Lydxn 🇨🇦 924 90 124ms 6 May 2022 266th Bubbler-4 923 33 2,528ms 6 May 2022 266th rak1507 🇬🇧 923 33 108ms 8 May 2022 266th ngn 🇧🇬 923 33 25ms 11 May 2022 266th zacjl 923 33 32ms 3 Jun 2025 266th GrayJoKing 🇦🇺 923 33 13ms 4 Jun 2025 266th HPWiz 🇳🇿 923 33 9ms 16 Nov 2025 272nd nwellnhof 🇩🇪 923 51 35ms 4 May 2022 272nd primo-ppcg 🇹🇭 923 51 38ms 6 May 2022 272nd janlelis 923 51 36ms 10 May 2022 272nd Natanaelel 🇸🇪 923 51 39ms 2 Jun 2022 276th uiamn 923 58 11ms 6 Sep 2022 276th 5quiwyrm 923 58 10ms 29 Sep 2022 276th alasdair-greenland 923 58 14ms 13 Jan 2023 276th kirjavascript 923 58 10ms 4 Aug 2025 276th Posandu 923 58 11ms 26 Aug 2025 276th mrxz 🇳🇱 923 58 10ms 3 Sep 2025 282nd MichalMarsalek 🇨🇿 923 71 142ms 5 May 2022 282nd Lydxn 🇨🇦 923 71 145ms 7 May 2022 282nd GrayJoKing 🇦🇺 923 71 156ms 8 May 2022 282nd JayXon 🇺🇸 923 71 128ms 8 May 2022 282nd Steffan153 🇫🇮 923 71 145ms 9 Mar 2023 282nd Shanethegamer 🇺🇸 923 71 127ms 15 May 2023 282nd MeWhenI 🇻🇦 923 71 152ms 8 Aug 2023 282nd sean-niemann 🇺🇸 923 71 135ms 9 Jan 2025 290th Herbert00709 🇵🇱 923 92 54ms 17 Nov 2023 290th 4QT0R 923 92 72ms 23 Nov 2023 290th ovs-code 🇩🇪 923 92 61ms 3 Jun 2024 293rd GrayJoKing 🇦🇺 922 74 4ms 23 Dec 2025 293rd FlyingPenguin223 922 74 6ms 29 Dec 2025 295th Steffan153 🇫🇮 922 76 12ms 15 May 2023 295th primo-ppcg 🇹🇭 922 76 20ms 15 May 2023 295th Lydxn 🇨🇦 922 76 8ms 22 May 2023 295th GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 295th kg583 🇺🇸 922 76 12ms 3 days ago 300th xnor-gate 920 63 187ms 20 Jan 2025 301st pardouin 🇫🇷 919 72 2,191ms 21 May 2025 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 101ms 7 May 2022 306th JayXon 🇺🇸 918 79 588ms 5 Apr 2023 306th Lydxn 🇨🇦 918 79 619ms 9 Apr 2023 308th JayXon 🇺🇸 918 105 296ms 4 Oct 2025 309th Steffan153 🇫🇮 917 71 110ms 14 Oct 2022 309th Shanethegamer 🇺🇸 917 71 111ms 15 Oct 2022 309th stefangimmillaro 917 71 115ms 16 Oct 2022 309th MeWhenI 🇻🇦 917 71 116ms 16 Oct 2022 313th annaproxy 917 79 116ms 24 Aug 2022 313th GrayJoKing 🇦🇺 917 79 85ms 28 Aug 2022 313th IanUtley 917 79 117ms 3 Nov 2023 313th Kacarott 🇦🇺 917 79 121ms 13 Jun 2024 317th Steffan153 🇫🇮 917 81 24ms 11 Dec 2023 318th arctouch-cristiannevianna 917 85 391ms 3 Apr 2023 318th tomtheisen 🇺🇸 917 85 422ms 10 Apr 2025 320th Shanethegamer 🇺🇸 917 87 461ms 15 May 2023 First Prev 241–320 of 3,598 Next Last