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 Gray Code Decoder Gray Code Encoder 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 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 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 MeWhenI 🇻🇦 931 68 98ms 23 Feb 2023 241st JayXon 🇺🇸 931 68 98ms 4 Mar 2025 243rd Lydxn 🇨🇦 930 70 110ms 17 Oct 2022 243rd JayXon 🇺🇸 930 70 120ms 17 Oct 2022 245th Natanaelel 🇸🇪 929 28 168ms 22 Jul 2022 245th SirBogman 🇺🇸 929 28 181ms 17 Sep 2022 245th CaedenHarper 🇨🇦 929 28 161ms 19 days ago 248th sisyphus-ppcg 🇦🇺 929 50 2,787ms 31 Jan 2023 248th saito-ta 🇯🇵 929 50 901ms 12 Dec 2024 250th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 250th JayXon 🇺🇸 929 67 37ms 19 Aug 2024 252nd JayXon 🇺🇸 928 57 212ms 19 Aug 2024 253rd sisyphus-ppcg 🇦🇺 928 65 106ms 19 Dec 2025 253rd ovs-code 🇩🇪 928 65 118ms 19 Dec 2025 255th roavin 928 84 361ms 23 Jun 2022 255th tkr-sh 🇰🇵 928 84 369ms 20 Aug 2022 255th Nickmiste 928 84 364ms 9 Nov 2022 255th Matgc04 928 84 373ms 19 May 2023 255th postie77 928 84 369ms 19 May 2023 255th ertz1ertz 928 84 377ms 13 Sep 2024 255th Grabnukebomb 928 84 366ms 13 Sep 2024 255th Shanethegamer 🇺🇸 928 84 388ms 9 Apr 2025 255th HumanoidCPU 928 84 390ms 10 Apr 2025 255th annaproxy 928 84 416ms 11 Apr 2025 255th Re-Adventures 🇮🇳 928 84 392ms 15 Apr 2025 255th janbehrens 🇩🇪 928 84 380ms 17 Apr 2025 255th Flix7dev 🇧🇪 928 84 344ms 21 Oct 2025 268th h3ra993huskp 🇯🇵 927 90 425ms 30 Nov 2025 269th KasperKivimaeki 🇫🇮 927 104 285ms 10 Dec 2025 270th Lydxn 🇨🇦 925 90 128ms 6 May 2022 271st nwellnhof 🇩🇪 924 51 40ms 4 May 2022 271st primo-ppcg 🇹🇭 924 51 42ms 6 May 2022 271st janlelis 924 51 38ms 10 May 2022 271st Natanaelel 🇸🇪 924 51 40ms 2 Jun 2022 271st blaztoma 🇱🇹 924 51 38ms 25 days ago 276th btnlq 924 59 5ms 6 Nov 2022 276th DialFrost 🇸🇬 924 59 5ms 23 Dec 2025 278th Bubbler-4 923 33 2,528ms 6 May 2022 278th rak1507 🇬🇧 923 33 108ms 8 May 2022 278th ngn 🇧🇬 923 33 25ms 11 May 2022 278th zacjl 923 33 32ms 3 Jun 2025 278th GrayJoKing 🇦🇺 923 33 13ms 4 Jun 2025 278th HPWiz 🇳🇿 923 33 9ms 16 Nov 2025 284th uiamn 923 58 11ms 6 Sep 2022 284th 5quiwyrm 923 58 11ms 29 Sep 2022 284th alasdair-greenland 923 58 11ms 13 Jan 2023 284th kirjavascript 923 58 11ms 4 Aug 2025 284th Posandu 923 58 10ms 26 Aug 2025 284th mrxz 🇳🇱 923 58 11ms 3 Sep 2025 290th MichalMarsalek 🇨🇿 923 71 137ms 5 May 2022 290th Lydxn 🇨🇦 923 71 132ms 7 May 2022 290th GrayJoKing 🇦🇺 923 71 139ms 8 May 2022 290th JayXon 🇺🇸 923 71 128ms 8 May 2022 290th Steffan153 🇫🇮 923 71 131ms 9 Mar 2023 290th Shanethegamer 🇺🇸 923 71 126ms 15 May 2023 290th MeWhenI 🇻🇦 923 71 133ms 8 Aug 2023 290th sean-niemann 🇺🇸 923 71 129ms 9 Jan 2025 298th GrayJoKing 🇦🇺 923 74 4ms 23 Dec 2025 298th FlyingPenguin223 923 74 6ms 29 Dec 2025 300th Herbert00709 🇵🇱 923 92 59ms 17 Nov 2023 300th 4QT0R 923 92 60ms 23 Nov 2023 300th ovs-code 🇩🇪 923 92 63ms 3 Jun 2024 303rd Steffan153 🇫🇮 922 76 12ms 15 May 2023 303rd primo-ppcg 🇹🇭 922 76 20ms 15 May 2023 303rd Lydxn 🇨🇦 922 76 8ms 22 May 2023 303rd GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 303rd kg583 🇺🇸 922 76 12ms 22 Feb 2026 308th pardouin 🇫🇷 921 72 2,717ms 21 May 2025 309th xnor-gate 920 63 187ms 20 Jan 2025 310th Steffan153 🇫🇮 920 79 21ms 16 days ago 311th primo-ppcg 🇹🇭 918 61 7ms 6 May 2022 311th sisyphus-ppcg 🇦🇺 918 61 9ms 14 Jul 2022 313th Lydxn 🇨🇦 918 70 148ms 7 May 2022 313th JayXon 🇺🇸 918 70 143ms 7 May 2022 315th annaproxy 918 79 112ms 24 Aug 2022 315th GrayJoKing 🇦🇺 918 79 86ms 28 Aug 2022 315th JayXon 🇺🇸 918 79 560ms 5 Apr 2023 315th Lydxn 🇨🇦 918 79 556ms 9 Apr 2023 315th IanUtley 918 79 115ms 3 Nov 2023 315th Kacarott 🇦🇺 918 79 121ms 13 Jun 2024 First Prev 241–320 of 3,665 Next Last