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 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 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 Calendar 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 Multitap Input 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Calendar 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 Multitap Input 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 290th snoozingnewt 🇨🇦 916 61 23ms 5 days ago 302nd MichalMarsalek 🇨🇿 915 71 143ms 5 May 2022 302nd Lydxn 🇨🇦 915 71 174ms 7 May 2022 302nd GrayJoKing 🇦🇺 915 71 122ms 8 May 2022 302nd JayXon 🇺🇸 915 71 121ms 8 May 2022 302nd Steffan153 🇫🇮 915 71 133ms 9 Mar 2023 302nd Shanethegamer 🇺🇸 915 71 131ms 15 May 2023 302nd MeWhenI 🇻🇦 915 71 128ms 8 Aug 2023 302nd sean-niemann 🇺🇸 915 71 127ms 9 Jan 2025 310th Steffan153 🇫🇮 915 76 11ms 15 May 2023 310th primo-ppcg 🇹🇭 915 76 17ms 15 May 2023 310th Lydxn 🇨🇦 915 76 8ms 22 May 2023 310th GrayJoKing 🇦🇺 915 76 13ms 24 Aug 2023 314th edsrzf 🇳🇿 914 54 817ms 13 Sep 2025 314th CaedenHarper 🇨🇦 914 54 826ms 27 Sep 2025 314th sean-niemann 🇺🇸 914 54 833ms 27 Sep 2025 314th albanian-laundromat 914 54 859ms 27 days ago 314th xsot 🇸🇬 914 54 873ms 26 days ago 319th xnor-gate 914 63 187ms 20 Jan 2025 320th arctouch-cristiannevianna 913 85 319ms 3 Apr 2023 320th Widgitty 913 85 314ms 1 Sep 2023 320th tomtheisen 🇺🇸 913 85 344ms 10 Apr 2025 323rd kmathis22 913 91 548ms 20 days ago 324th primo-ppcg 🇹🇭 912 61 6ms 6 May 2022 324th sisyphus-ppcg 🇦🇺 912 61 9ms 14 Jul 2022 326th Steffan153 🇫🇮 912 71 4ms 10 Dec 2022 326th synt7x 🇺🇸 912 71 4ms 7 Jul 2025 328th pardouin 🇫🇷 912 72 2,899ms 21 May 2025 329th edsrzf 🇳🇿 912 78 19ms 16 Aug 2025 330th Lydxn 🇨🇦 911 70 96ms 7 May 2022 330th JayXon 🇺🇸 911 70 96ms 7 May 2022 332nd Steffan153 🇫🇮 911 71 100ms 14 Oct 2022 332nd Shanethegamer 🇺🇸 911 71 100ms 15 Oct 2022 332nd stefangimmillaro 911 71 99ms 16 Oct 2022 332nd MeWhenI 🇻🇦 911 71 101ms 16 Oct 2022 336th annaproxy 911 78 111ms 13 Jan 2023 336th IanUtley 911 78 114ms 12 Nov 2023 336th GrayJoKing 🇦🇺 911 78 79ms 28 Nov 2023 339th Shanethegamer 🇺🇸 911 86 390ms 15 May 2023 339th JayXon 🇺🇸 911 86 508ms 15 May 2023 339th Steffan153 🇫🇮 911 86 389ms 16 May 2023 339th Lydxn 🇨🇦 911 86 465ms 16 May 2023 339th GrayJoKing 🇦🇺 911 86 400ms 11 Aug 2023 339th sean-niemann 🇺🇸 911 86 436ms 11 Jul 2024 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 25 days ago 351st andersk 🇺🇸 910 91 180ms 25 Oct 2022 351st Super-Pizza 🇨🇦 910 91 214ms 4 Dec 2022 351st klixel 🇨🇦 910 91 141ms 20 May 2023 351st lynn 910 91 167ms 6 Jul 2024 351st edsrzf 🇳🇿 910 91 188ms 29 Nov 2024 351st DialFrost 🇸🇬 910 91 136ms 7 Apr 2025 357th Lydxn 🇨🇦 909 47 249ms 5 May 2022 358th JayXon 🇺🇸 909 53 375ms 17 Aug 2024 359th tailorspy 909 93 57ms 27 May 2024 359th sean-niemann 🇺🇸 909 93 55ms 9 Jun 2025 359th KasperKivimaeki 🇫🇮 909 93 56ms 26 Oct 2025 362nd nai62 908 68 7ms 27 Aug 2022 363rd ovs-code 🇩🇪 908 75 78ms 12 Sep 2024 363rd Kacarott 🇦🇺 908 75 62ms 13 Sep 2024 365th Lydxn 🇨🇦 908 81 39ms 1 Apr 2023 366th Shanethegamer 🇺🇸 907 61 3ms 9 Oct 2023 366th edsrzf 🇳🇿 907 61 3ms 4 Jul 2025 368th GrayJoKing 🇦🇺 907 74 64ms 1 Nov 2023 369th lynn 907 78 1,328ms 5 May 2022 370th ovs-code 🇩🇪 905 67 94ms 13 Dec 2022 370th Steffan153 🇫🇮 905 67 113ms 18 Dec 2022 370th Lydxn 🇨🇦 905 67 116ms 4 Feb 2023 370th DialFrost 🇸🇬 905 67 99ms 17 Mar 2025 374th GrayJoKing 🇦🇺 905 71 267ms 10 Aug 2023 375th primo-ppcg 🇹🇭 905 93 30ms 7 May 2022 First Prev 301–375 of 3,489 Next Last