Collatz in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 526th P-Quentin 🇫🇷 887 63 20ms 3 Aug 2022 526th kaptsanovb 887 63 24ms 20 Apr 2023 526th fkantelberg 887 63 20ms 14 Jul 2023 526th snoozingnewt 🇺🇸 887 63 35ms 10 Sep 2023 526th VictorStenvers 🇳🇱 887 63 22ms 13 Nov 2023 526th 1231234md5 🇨🇳 887 63 21ms 14 Dec 2023 526th f-tucker 887 63 22ms 6 Feb 2024 526th JunkIce 887 63 22ms 24 Nov 2024 526th Kowalskiexe 🇵🇱 887 63 21ms 19 Apr 2025 526th 123mjb 887 63 22ms 2 Jun 2025 526th DrakeSeteraO 887 63 51ms 23 days ago 537th RockOfStone 887 73 5ms 26 days ago 538th canissimia 🇦🇶 887 204 16ms 25 Nov 2023 539th Shanethegamer 🇺🇸 886 61 6ms 31 Oct 2022 539th MeWhenI 🇻🇦 886 61 5ms 4 Nov 2022 541st lynn 886 65 316ms 5 May 2022 541st GrayJoKing 🇦🇺 886 65 327ms 5 May 2022 541st Sakisan 🇧🇪 886 65 214ms 6 May 2022 541st JayXon 🇺🇸 886 65 366ms 17 Oct 2022 541st Steffan153 🇫🇮 886 65 172ms 12 Nov 2022 541st tobeannouncd 886 65 331ms 25 Apr 2025 541st sean-niemann 🇺🇸 886 65 174ms 9 Jun 2025 548th stefangimmillaro 886 71 89ms 2 Oct 2022 548th Steffan153 🇫🇮 886 71 90ms 23 Feb 2023 548th Shanethegamer 🇺🇸 886 71 89ms 16 May 2023 548th sean-niemann 🇺🇸 886 71 92ms 12 Jul 2024 552nd Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 552nd edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 554th JayXon 🇺🇸 886 74 3,078ms 14 Nov 2024 555th DialFrost 🇸🇬 886 95 32ms 10 Dec 2024 556th canissimia 🇦🇶 886 110 3,068ms 20 Feb 2023 557th GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 558th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 559th albanian-laundromat 884 94 339ms 24 Sep 2025 559th kmathis22 884 94 340ms 14 Oct 2025 559th jkelly467 884 94 339ms 23 days ago 559th HumanoidCPU 884 94 337ms 8 days ago 563rd DialFrost 🇸🇬 883 76 81ms 17 Mar 2025 564th jared-hughes 883 130 23ms 15 Dec 2024 565th primo-ppcg 🇹🇭 882 85 43ms 14 Jan 2025 565th MeWhenI 🇻🇦 882 85 44ms 21 Apr 2025 567th SiestaGuru 882 88 325ms 9 Jan 2023 567th rifatx 882 88 312ms 5 Jul 2024 567th kmathis22 882 88 349ms 25 Sep 2025 567th arcpolaris 882 88 297ms 8 days ago 571st primo-ppcg 🇹🇭 881 52 213ms 5 May 2022 571st dvargas46 🇺🇸 881 52 83ms 22 Dec 2022 573rd stefangimmillaro 881 53 38ms 2 Oct 2022 573rd Haksell 🇦🇶 881 53 40ms 22 Feb 2023 575th DialFrost 🇸🇬 881 56 820ms 1 Sep 2025 576th GrayJoKing 🇦🇺 881 70 2ms 6 May 2022 576th ovs-code 🇩🇪 881 70 2ms 8 Oct 2023 576th 09cf 881 70 13ms 8 Oct 2023 576th saito-ta 🇯🇵 881 70 3ms 21 Dec 2023 576th sean-niemann 🇺🇸 881 70 3ms 10 Jul 2024 576th KasperKivimaeki 🇫🇮 881 70 6ms 8 Aug 2025 582nd ovs-code 🇩🇪 881 89 457ms 24 Jul 2024 582nd jipsong 🇩🇪 881 89 467ms 7 Apr 2025 584th nipzu 881 94 129ms 17 May 2022 584th Natanaelel 🇸🇪 881 94 130ms 17 Jun 2022 584th nkoppel 881 94 123ms 19 Oct 2022 584th ovs-code 🇩🇪 881 94 125ms 21 Jun 2023 584th mousetail 🇳🇱 881 94 127ms 12 Jan 2024 589th Irratix 🇳🇱 881 96 53ms 4 May 2022 589th MeWhenI 🇻🇦 881 96 56ms 1 Jun 2022 589th janbehrens 🇩🇪 881 96 54ms 21 Apr 2023 589th Shanethegamer 🇺🇸 881 96 56ms 15 May 2023 589th Yewzir 🇧🇪 881 96 57ms 11 Nov 2023 589th MateuszPietrzak 🇵🇱 881 96 56ms 18 Nov 2023 589th kkoenig 881 96 55ms 21 Dec 2023 589th BlankSpruce 881 96 56ms 20 Aug 2024 589th fuzzylojik-golf 🇺🇸 881 96 63ms 14 Jun 2025 598th m-tkach 🇺🇦 881 112 69ms 22 Jun 2025 599th sisyphus-ppcg 🇦🇺 880 40 369ms 31 Jan 2023 599th sean-niemann 🇺🇸 880 40 365ms 8 Mar 2025 First Prev 526–600 of 3,445 Next Last