Collatz in all languages in chars. 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 Chars Time Submitted 237th ertz1ertz 925 84 377ms 13 Sep 2024 237th Grabnukebomb 925 84 366ms 13 Sep 2024 237th Shanethegamer 🇺🇸 925 84 388ms 9 Apr 2025 237th HumanoidCPU 925 84 390ms 10 Apr 2025 237th annaproxy 925 84 380ms 11 Apr 2025 237th Re-Adventures 🇮🇳 925 84 376ms 15 Apr 2025 237th janbehrens 🇩🇪 925 84 380ms 17 Apr 2025 248th ovs-code 🇩🇪 924 60 5ms 9 Oct 2023 248th GrayJoKing 🇦🇺 924 60 4ms 11 Oct 2023 248th Lydxn 🇨🇦 924 60 5ms 11 Oct 2023 248th GolfingSuccess 🇬🇷 924 60 4ms 16 Nov 2023 248th Steffan153 🇫🇮 924 60 5ms 28 Jan 2024 248th JayXon 🇺🇸 924 60 4ms 29 Jan 2024 248th rucin93 🇵🇱 924 60 5ms 10 Jul 2024 248th sean-niemann 🇺🇸 924 60 5ms 10 Jul 2024 248th edsrzf 🇳🇿 924 60 5ms 9 Mar 2026 257th h3ra993huskp 🇯🇵 924 90 425ms 30 Nov 2025 258th KasperKivimaeki 🇫🇮 924 103 358ms 10 Dec 2025 259th sisyphus-ppcg 🇦🇺 922 65 106ms 19 Dec 2025 259th ovs-code 🇩🇪 922 65 118ms 19 Dec 2025 261st Steffan153 🇫🇮 922 67 37ms 19 Aug 2024 261st JayXon 🇺🇸 922 67 37ms 19 Aug 2024 263rd sisyphus-ppcg 🇦🇺 921 50 2,565ms 31 Jan 2023 263rd saito-ta 🇯🇵 921 50 844ms 12 Dec 2024 265th Steffan153 🇫🇮 921 51 1,122ms 21 days ago 266th Lydxn 🇨🇦 921 90 127ms 6 May 2022 267th Herbert00709 🇵🇱 921 92 59ms 17 Nov 2023 267th 4QT0R 921 92 61ms 23 Nov 2023 267th ovs-code 🇩🇪 921 92 56ms 3 Jun 2024 270th uiamn 919 58 11ms 6 Sep 2022 270th 5quiwyrm 919 58 12ms 29 Sep 2022 270th alasdair-greenland 919 58 12ms 13 Jan 2023 270th kirjavascript 919 58 11ms 4 Aug 2025 270th Posandu 919 58 11ms 26 Aug 2025 270th mrxz 🇳🇱 919 58 11ms 3 Sep 2025 276th Mukundan314 918 55 1,610ms 27 Dec 2025 277th btnlq 918 59 5ms 6 Nov 2022 277th DialFrost 🇸🇬 918 59 5ms 23 Dec 2025 279th JayXon 🇺🇸 918 69 554ms 5 Apr 2023 279th Lydxn 🇨🇦 918 69 568ms 9 Apr 2023 281st GrayJoKing 🇦🇺 918 74 4ms 23 Dec 2025 281st FlyingPenguin223 918 74 6ms 29 Dec 2025 283rd primo-ppcg 🇹🇭 917 24 163ms 10 Dec 2022 284th Irratix 🇳🇱 917 61 47ms 7 May 2022 284th TFeld00 🇩🇰 917 61 26ms 17 May 2022 284th hallvabo 🇳🇴 917 61 21ms 4 Sep 2022 284th DialFrost 🇸🇬 917 61 26ms 19 Dec 2022 284th anter69 🇭🇺 917 61 22ms 19 Dec 2022 284th Alex-x90 🇺🇸 917 61 20ms 27 Dec 2022 284th commandz0 🇺🇸 917 61 20ms 22 Aug 2023 284th fgrosshans 🇫🇷 917 61 20ms 22 Jul 2024 284th duckyluuk 🇳🇱 917 61 21ms 15 Aug 2024 284th rucin93 🇵🇱 917 61 19ms 31 May 2025 284th katss2 917 61 21ms 17 Aug 2025 284th snoozingnewt 🇨🇦 917 61 21ms 6 Dec 2025 284th Flekay 🇩🇪 917 61 20ms 15 Feb 2026 284th JOrE20 917 61 17ms 25 Feb 2026 284th jusaka 917 61 18ms 7 days ago 299th MichalMarsalek 🇨🇿 917 71 137ms 5 May 2022 299th Lydxn 🇨🇦 917 71 132ms 7 May 2022 299th GrayJoKing 🇦🇺 917 71 128ms 8 May 2022 299th JayXon 🇺🇸 917 71 128ms 8 May 2022 299th Steffan153 🇫🇮 917 71 131ms 9 Mar 2023 299th Shanethegamer 🇺🇸 917 71 126ms 15 May 2023 299th MeWhenI 🇻🇦 917 71 133ms 8 Aug 2023 299th sean-niemann 🇺🇸 917 71 129ms 9 Jan 2025 307th Steffan153 🇫🇮 916 76 12ms 15 May 2023 307th primo-ppcg 🇹🇭 916 76 20ms 15 May 2023 307th Lydxn 🇨🇦 916 76 8ms 22 May 2023 307th GrayJoKing 🇦🇺 916 76 12ms 24 Aug 2023 307th kg583 🇺🇸 916 76 12ms 22 Feb 2026 312th xnor-gate 915 63 187ms 20 Jan 2025 313th pardouin 🇫🇷 915 72 2,442ms 21 May 2025 314th Steffan153 🇫🇮 915 76 23ms 20 days ago 315th arctouch-cristiannevianna 914 85 345ms 3 Apr 2023 315th Widgitty 914 85 367ms 1 Sep 2023 315th tomtheisen 🇺🇸 914 85 386ms 10 Apr 2025 318th annaproxy 913 78 112ms 13 Jan 2023 318th IanUtley 913 78 115ms 12 Nov 2023 318th GrayJoKing 🇦🇺 913 78 81ms 28 Nov 2023 First Prev 241–320 of 3,704 Next Last