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 Rectangle Fill 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 241st Natanaelel 🇸🇪 929 28 182ms 22 Jul 2022 241st SirBogman 🇺🇸 929 28 173ms 17 Sep 2022 243rd edsrzf 🇳🇿 929 52 855ms 5 days ago 243rd Steffan153 🇫🇮 929 52 965ms 5 days ago 245th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 245th JayXon 🇺🇸 929 67 37ms 19 Aug 2024 247th sisyphus-ppcg 🇦🇺 928 50 2,596ms 31 Jan 2023 247th saito-ta 🇯🇵 928 50 868ms 12 Dec 2024 249th JayXon 🇺🇸 928 57 277ms 19 Aug 2024 250th sisyphus-ppcg 🇦🇺 928 65 114ms 19 Dec 2025 250th ovs-code 🇩🇪 928 65 118ms 19 Dec 2025 252nd roavin 928 84 378ms 23 Jun 2022 252nd tkr-sh 🇰🇵 928 84 369ms 20 Aug 2022 252nd Nickmiste 928 84 366ms 9 Nov 2022 252nd Matgc04 928 84 374ms 19 May 2023 252nd postie77 928 84 383ms 19 May 2023 252nd ertz1ertz 928 84 388ms 13 Sep 2024 252nd Grabnukebomb 928 84 366ms 13 Sep 2024 252nd Shanethegamer 🇺🇸 928 84 450ms 9 Apr 2025 252nd HumanoidCPU 928 84 390ms 10 Apr 2025 252nd annaproxy 928 84 416ms 11 Apr 2025 252nd Re-Adventures 🇮🇳 928 84 392ms 15 Apr 2025 252nd janbehrens 🇩🇪 928 84 380ms 17 Apr 2025 252nd Flix7dev 🇧🇪 928 84 373ms 21 Oct 2025 265th h3ra993huskp 🇯🇵 927 90 425ms 30 Nov 2025 266th KasperKivimaeki 🇫🇮 927 104 285ms 10 Dec 2025 267th btnlq 924 59 5ms 6 Nov 2022 267th DialFrost 🇸🇬 924 59 5ms 23 Dec 2025 269th Lydxn 🇨🇦 924 90 127ms 6 May 2022 270th Bubbler-4 923 33 2,528ms 6 May 2022 270th rak1507 🇬🇧 923 33 108ms 8 May 2022 270th ngn 🇧🇬 923 33 25ms 11 May 2022 270th zacjl 923 33 32ms 3 Jun 2025 270th GrayJoKing 🇦🇺 923 33 13ms 4 Jun 2025 270th HPWiz 🇳🇿 923 33 9ms 16 Nov 2025 276th nwellnhof 🇩🇪 923 51 35ms 4 May 2022 276th primo-ppcg 🇹🇭 923 51 38ms 6 May 2022 276th janlelis 923 51 36ms 10 May 2022 276th Natanaelel 🇸🇪 923 51 39ms 2 Jun 2022 276th blaztoma 🇱🇹 923 51 40ms 4 days ago 281st uiamn 923 58 12ms 6 Sep 2022 281st 5quiwyrm 923 58 12ms 29 Sep 2022 281st alasdair-greenland 923 58 11ms 13 Jan 2023 281st kirjavascript 923 58 15ms 4 Aug 2025 281st Posandu 923 58 11ms 26 Aug 2025 281st mrxz 🇳🇱 923 58 11ms 3 Sep 2025 287th MichalMarsalek 🇨🇿 923 71 137ms 5 May 2022 287th Lydxn 🇨🇦 923 71 135ms 7 May 2022 287th GrayJoKing 🇦🇺 923 71 139ms 8 May 2022 287th JayXon 🇺🇸 923 71 128ms 8 May 2022 287th Steffan153 🇫🇮 923 71 131ms 9 Mar 2023 287th Shanethegamer 🇺🇸 923 71 126ms 15 May 2023 287th MeWhenI 🇻🇦 923 71 133ms 8 Aug 2023 287th sean-niemann 🇺🇸 923 71 129ms 9 Jan 2025 295th GrayJoKing 🇦🇺 923 74 4ms 23 Dec 2025 295th FlyingPenguin223 923 74 6ms 29 Dec 2025 297th Herbert00709 🇵🇱 923 92 60ms 17 Nov 2023 297th 4QT0R 923 92 61ms 23 Nov 2023 297th ovs-code 🇩🇪 923 92 63ms 3 Jun 2024 300th Steffan153 🇫🇮 922 76 12ms 15 May 2023 300th primo-ppcg 🇹🇭 922 76 20ms 15 May 2023 300th Lydxn 🇨🇦 922 76 8ms 22 May 2023 300th GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 300th kg583 🇺🇸 922 76 12ms 21 days ago 305th xnor-gate 920 63 187ms 20 Jan 2025 306th pardouin 🇫🇷 920 72 2,191ms 21 May 2025 307th primo-ppcg 🇹🇭 918 61 8ms 6 May 2022 307th sisyphus-ppcg 🇦🇺 918 61 9ms 14 Jul 2022 309th Lydxn 🇨🇦 918 70 148ms 7 May 2022 309th JayXon 🇺🇸 918 70 143ms 7 May 2022 311th JayXon 🇺🇸 918 79 560ms 5 Apr 2023 311th Lydxn 🇨🇦 918 79 556ms 9 Apr 2023 313th Steffan153 🇫🇮 918 80 19ms 4 days ago 313th kg583 🇺🇸 918 80 19ms 4 days ago 315th JayXon 🇺🇸 918 105 291ms 4 Oct 2025 316th Steffan153 🇫🇮 917 71 124ms 14 Oct 2022 316th Shanethegamer 🇺🇸 917 71 125ms 15 Oct 2022 316th stefangimmillaro 917 71 114ms 16 Oct 2022 316th MeWhenI 🇻🇦 917 71 127ms 16 Oct 2022 320th annaproxy 917 79 116ms 24 Aug 2022 First Prev 241–320 of 3,625 Next Last