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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 525th GrayJoKing 🇦🇺 886 65 327ms 5 May 2022 525th Sakisan 🇧🇪 886 65 6 May 2022 525th JayXon 🇺🇸 886 65 366ms 17 Oct 2022 525th Steffan153 🇫🇮 886 65 172ms 12 Nov 2022 525th tobeannouncd 886 65 331ms 25 Apr 2025 525th sean-niemann 🇺🇸 886 65 174ms 9 Jun 2025 532nd stefangimmillaro 886 71 2 Oct 2022 532nd Steffan153 🇫🇮 886 71 23 Feb 2023 532nd Shanethegamer 🇺🇸 886 71 16 May 2023 532nd sean-niemann 🇺🇸 886 71 12 Jul 2024 536th Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 536th edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 538th RockOfStone 886 73 2 days ago 539th JayXon 🇺🇸 886 74 14 Nov 2024 540th canissimia 🇦🇶 886 110 3,068ms 20 Feb 2023 541st canissimia 🇦🇶 886 204 16ms 25 Nov 2023 542nd Shanethegamer 🇺🇸 885 61 6ms 31 Oct 2022 542nd MeWhenI 🇻🇦 885 61 5ms 4 Nov 2022 544th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 545th DialFrost 🇸🇬 884 95 32ms 10 Dec 2024 546th GrayJoKing 🇦🇺 883 77 76ms 13 Sep 2024 547th albanian-laundromat 883 94 27 days ago 547th kmathis22 883 94 7 days ago 549th jared-hughes 883 130 23ms 15 Dec 2024 550th DialFrost 🇸🇬 882 76 91ms 17 Mar 2025 551st primo-ppcg 🇹🇭 882 85 14 Jan 2025 551st MeWhenI 🇻🇦 882 85 21 Apr 2025 553rd SiestaGuru 882 88 325ms 9 Jan 2023 553rd rifatx 882 88 312ms 5 Jul 2024 553rd kmathis22 882 88 26 days ago 556th stefangimmillaro 881 53 38ms 2 Oct 2022 556th Haksell 🇦🇶 881 53 40ms 22 Feb 2023 558th GrayJoKing 🇦🇺 881 70 2ms 6 May 2022 558th ovs-code 🇩🇪 881 70 2ms 8 Oct 2023 558th 09cf 881 70 13ms 8 Oct 2023 558th saito-ta 🇯🇵 881 70 3ms 21 Dec 2023 558th sean-niemann 🇺🇸 881 70 3ms 10 Jul 2024 558th KasperKivimaeki 🇫🇮 881 70 6ms 8 Aug 2025 564th nipzu 881 94 145ms 17 May 2022 564th Natanaelel 🇸🇪 881 94 130ms 17 Jun 2022 564th nkoppel 881 94 133ms 19 Oct 2022 564th ovs-code 🇩🇪 881 94 145ms 21 Jun 2023 564th mousetail 🇳🇱 881 94 151ms 12 Jan 2024 569th m-tkach 🇺🇦 881 112 82ms 22 Jun 2025 570th sisyphus-ppcg 🇦🇺 880 40 31 Jan 2023 570th sean-niemann 🇺🇸 880 40 8 Mar 2025 572nd primo-ppcg 🇹🇭 880 52 213ms 5 May 2022 572nd dvargas46 🇺🇸 880 52 83ms 22 Dec 2022 574th DialFrost 🇸🇬 880 56 1 Sep 2025 575th ovs-code 🇩🇪 880 89 457ms 24 Jul 2024 575th jipsong 🇩🇪 880 89 467ms 7 Apr 2025 577th Irratix 🇳🇱 880 96 63ms 4 May 2022 577th MeWhenI 🇻🇦 880 96 61ms 1 Jun 2022 577th janbehrens 🇩🇪 880 96 65ms 21 Apr 2023 577th Shanethegamer 🇺🇸 880 96 66ms 15 May 2023 577th Yewzir 🇧🇪 880 96 72ms 11 Nov 2023 577th MateuszPietrzak 🇵🇱 880 96 63ms 18 Nov 2023 577th kkoenig 880 96 63ms 21 Dec 2023 577th BlankSpruce 880 96 63ms 20 Aug 2024 577th fuzzylojik-golf 🇺🇸 880 96 70ms 14 Jun 2025 586th emplv 🇱🇻 880 110 310ms 5 May 2022 586th Shanethegamer 🇺🇸 880 110 261ms 21 Nov 2023 586th edsrzf 🇳🇿 880 110 306ms 28 Nov 2024 586th targrik 880 110 279ms 30 Jun 2025 590th ovs-code 🇩🇪 878 73 300ms 22 Jul 2023 591st Shanethegamer 🇺🇸 878 81 19ms 19 Dec 2023 591st emgordon154 878 81 26ms 29 Jul 2025 593rd GrayJoKing 🇦🇺 877 72 31 May 2022 593rd Shanethegamer 🇺🇸 877 72 1 Jun 2022 593rd Steffan153 🇫🇮 877 72 10 Dec 2022 596th steffan-polygolf 877 74 150ms 14 Feb 2024 597th mousetail 🇳🇱 876 40 73ms 29 Aug 2025 598th primo-ppcg 🇹🇭 876 193 104ms 14 Aug 2025 599th GrayJoKing 🇦🇺 875 84 19 Jun 2022 599th primo-ppcg 🇹🇭 875 84 29 Jun 2022 First Prev 526–600 of 3,385 Next Last