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 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 ><> 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 Lily 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 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 Chars Time Submitted 321st xnor-gate 914 63 187ms 20 Jan 2025 322nd arctouch-cristiannevianna 913 85 391ms 3 Apr 2023 322nd Widgitty 913 85 403ms 1 Sep 2023 322nd tomtheisen 🇺🇸 913 85 422ms 10 Apr 2025 325th kmathis22 913 91 370ms 20 Nov 2025 326th primo-ppcg 🇹🇭 912 61 7ms 6 May 2022 326th sisyphus-ppcg 🇦🇺 912 61 10ms 14 Jul 2022 328th pardouin 🇫🇷 912 72 2,191ms 21 May 2025 329th edsrzf 🇳🇿 912 78 25ms 16 Aug 2025 330th Shanethegamer 🇺🇸 912 86 461ms 15 May 2023 330th JayXon 🇺🇸 912 86 484ms 15 May 2023 330th Steffan153 🇫🇮 912 86 460ms 16 May 2023 330th Lydxn 🇨🇦 912 86 473ms 16 May 2023 330th GrayJoKing 🇦🇺 912 86 461ms 11 Aug 2023 330th sean-niemann 🇺🇸 912 86 473ms 11 Jul 2024 336th Lydxn 🇨🇦 911 70 100ms 7 May 2022 336th JayXon 🇺🇸 911 70 104ms 7 May 2022 338th Steffan153 🇫🇮 911 71 107ms 14 Oct 2022 338th Shanethegamer 🇺🇸 911 71 115ms 15 Oct 2022 338th stefangimmillaro 911 71 109ms 16 Oct 2022 338th MeWhenI 🇻🇦 911 71 105ms 16 Oct 2022 342nd annaproxy 911 78 111ms 13 Jan 2023 342nd IanUtley 911 78 114ms 12 Nov 2023 342nd GrayJoKing 🇦🇺 911 78 79ms 28 Nov 2023 345th Bubbler-4 910 33 2,528ms 6 May 2022 345th rak1507 🇬🇧 910 33 108ms 8 May 2022 345th ngn 🇧🇬 910 33 25ms 11 May 2022 345th zacjl 910 33 32ms 3 Jun 2025 345th GrayJoKing 🇦🇺 910 33 13ms 4 Jun 2025 345th HPWiz 🇳🇿 910 33 9ms 16 Nov 2025 351st andersk 🇺🇸 910 91 132ms 25 Oct 2022 351st Super-Pizza 🇨🇦 910 91 124ms 4 Dec 2022 351st klixel 🇨🇦 910 91 134ms 20 May 2023 351st lynn 910 91 126ms 6 Jul 2024 351st edsrzf 🇳🇿 910 91 129ms 29 Nov 2024 351st DialFrost 🇸🇬 910 91 125ms 7 Apr 2025 351st elgan65536 🇺🇸 910 91 131ms 5 days ago 358th tailorspy 910 93 55ms 27 May 2024 358th sean-niemann 🇺🇸 910 93 53ms 9 Jun 2025 358th KasperKivimaeki 🇫🇮 910 93 56ms 26 Oct 2025 361st Lydxn 🇨🇦 909 47 257ms 5 May 2022 362nd JayXon 🇺🇸 909 53 411ms 17 Aug 2024 363rd Lydxn 🇨🇦 909 81 39ms 1 Apr 2023 364th Shanethegamer 🇺🇸 908 61 3ms 9 Oct 2023 364th edsrzf 🇳🇿 908 61 3ms 4 Jul 2025 366th nai62 908 68 7ms 27 Aug 2022 367th ovs-code 🇩🇪 908 75 67ms 12 Sep 2024 367th Kacarott 🇦🇺 908 75 62ms 13 Sep 2024 369th GrayJoKing 🇦🇺 907 74 66ms 1 Nov 2023 370th lynn 907 78 1,382ms 5 May 2022 371st sean-niemann 🇺🇸 906 66 108ms 29 May 2025 372nd GrayJoKing 🇦🇺 905 71 321ms 10 Aug 2023 373rd primo-ppcg 🇹🇭 905 93 30ms 7 May 2022 373rd AlephSquirrel 905 93 26ms 21 Jan 2023 373rd kg583 🇺🇸 905 93 29ms 26 Dec 2024 373rd CLOStrophobic 🇮🇹 905 93 30ms 17 Jan 2025 373rd edsrzf 🇳🇿 905 93 30ms 3 Jul 2025 378th JayXon 🇺🇸 905 105 296ms 4 Oct 2025 379th KrausRaus 🇺🇸 904 59 11ms 4 May 2022 379th voytxt 🇨🇿 904 59 13ms 4 May 2022 379th KingSkyrock 🇺🇸 904 59 11ms 18 May 2022 379th ZakkkkAttackkkk 🇵🇭 904 59 13ms 14 Jul 2022 379th aksyristos 904 59 11ms 28 Oct 2022 379th nstearns96 🇬🇧 904 59 11ms 28 Nov 2022 379th janbehrens 🇩🇪 904 59 10ms 17 May 2023 379th Shanethegamer 🇺🇸 904 59 11ms 25 May 2023 379th Maznek 904 59 11ms 26 Jun 2023 379th SpiritAxolotl 🇺🇸 904 59 13ms 20 Mar 2024 379th Andrey-Plotnikov 904 59 10ms 19 May 2024 379th emgordon154 904 59 15ms 5 Aug 2024 379th duckyluuk 🇳🇱 904 59 11ms 3 Oct 2024 379th lifthrasiir 🇰🇷 904 59 10ms 23 Nov 2024 379th fuzzylojik-golf 🇺🇸 904 59 10ms 1 Jun 2025 379th acollett89 904 59 10ms 17 Jun 2025 379th iczelia 🇩🇪 904 59 12ms 23 Sep 2025 379th Yax42 🇫🇷 904 59 10ms 26 days ago 397th sean-niemann 🇺🇸 904 75 5ms 23 Dec 2025 397th Steffan153 🇫🇮 904 75 5ms 4 days ago 399th edsrzf 🇳🇿 903 72 160ms 3 Jul 2025 400th Shanethegamer 🇺🇸 903 77 13ms 15 May 2023 First Prev 321–400 of 3,554 Next Last