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 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 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 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 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 519th JunkIce 887 63 23ms 24 Nov 2024 519th Kowalskiexe 🇵🇱 887 63 20ms 19 Apr 2025 519th 123mjb 887 63 23ms 2 Jun 2025 519th DrakeSeteraO 887 63 53ms 10 days ago 530th lynn 886 65 316ms 5 May 2022 530th GrayJoKing 🇦🇺 886 65 327ms 5 May 2022 530th Sakisan 🇧🇪 886 65 214ms 6 May 2022 530th JayXon 🇺🇸 886 65 366ms 17 Oct 2022 530th Steffan153 🇫🇮 886 65 172ms 12 Nov 2022 530th tobeannouncd 886 65 331ms 25 Apr 2025 530th sean-niemann 🇺🇸 886 65 174ms 9 Jun 2025 537th stefangimmillaro 886 71 98ms 2 Oct 2022 537th Steffan153 🇫🇮 886 71 103ms 23 Feb 2023 537th Shanethegamer 🇺🇸 886 71 98ms 16 May 2023 537th sean-niemann 🇺🇸 886 71 99ms 12 Jul 2024 541st Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 541st edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 543rd RockOfStone 886 73 5ms 14 days ago 544th JayXon 🇺🇸 886 74 3,896ms 14 Nov 2024 545th canissimia 🇦🇶 886 110 3,068ms 20 Feb 2023 546th canissimia 🇦🇶 886 204 16ms 25 Nov 2023 547th Shanethegamer 🇺🇸 885 61 6ms 31 Oct 2022 547th MeWhenI 🇻🇦 885 61 5ms 4 Nov 2022 549th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 550th DialFrost 🇸🇬 884 95 32ms 10 Dec 2024 551st GrayJoKing 🇦🇺 883 77 76ms 13 Sep 2024 552nd albanian-laundromat 883 94 644ms 24 Sep 2025 552nd kmathis22 883 94 672ms 20 days ago 552nd jkelly467 883 94 357ms 11 days ago 555th jared-hughes 883 130 23ms 15 Dec 2024 556th DialFrost 🇸🇬 882 76 91ms 17 Mar 2025 557th primo-ppcg 🇹🇭 882 85 43ms 14 Jan 2025 557th MeWhenI 🇻🇦 882 85 44ms 21 Apr 2025 559th SiestaGuru 882 88 325ms 9 Jan 2023 559th rifatx 882 88 312ms 5 Jul 2024 559th kmathis22 882 88 349ms 25 Sep 2025 562nd stefangimmillaro 881 53 38ms 2 Oct 2022 562nd Haksell 🇦🇶 881 53 40ms 22 Feb 2023 564th GrayJoKing 🇦🇺 881 70 2ms 6 May 2022 564th ovs-code 🇩🇪 881 70 2ms 8 Oct 2023 564th 09cf 881 70 13ms 8 Oct 2023 564th saito-ta 🇯🇵 881 70 3ms 21 Dec 2023 564th sean-niemann 🇺🇸 881 70 3ms 10 Jul 2024 564th KasperKivimaeki 🇫🇮 881 70 6ms 8 Aug 2025 570th nipzu 881 94 128ms 17 May 2022 570th Natanaelel 🇸🇪 881 94 121ms 17 Jun 2022 570th nkoppel 881 94 121ms 19 Oct 2022 570th ovs-code 🇩🇪 881 94 121ms 21 Jun 2023 570th mousetail 🇳🇱 881 94 124ms 12 Jan 2024 575th m-tkach 🇺🇦 881 112 82ms 22 Jun 2025 576th sisyphus-ppcg 🇦🇺 880 40 362ms 31 Jan 2023 576th sean-niemann 🇺🇸 880 40 339ms 8 Mar 2025 578th primo-ppcg 🇹🇭 880 52 213ms 5 May 2022 578th dvargas46 🇺🇸 880 52 83ms 22 Dec 2022 580th DialFrost 🇸🇬 880 56 1,411ms 1 Sep 2025 581st ovs-code 🇩🇪 880 89 457ms 24 Jul 2024 581st jipsong 🇩🇪 880 89 467ms 7 Apr 2025 583rd Irratix 🇳🇱 880 96 63ms 4 May 2022 583rd MeWhenI 🇻🇦 880 96 61ms 1 Jun 2022 583rd janbehrens 🇩🇪 880 96 65ms 21 Apr 2023 583rd Shanethegamer 🇺🇸 880 96 66ms 15 May 2023 583rd Yewzir 🇧🇪 880 96 72ms 11 Nov 2023 583rd MateuszPietrzak 🇵🇱 880 96 63ms 18 Nov 2023 583rd kkoenig 880 96 63ms 21 Dec 2023 583rd BlankSpruce 880 96 63ms 20 Aug 2024 583rd fuzzylojik-golf 🇺🇸 880 96 70ms 14 Jun 2025 592nd emplv 🇱🇻 880 110 263ms 5 May 2022 592nd Shanethegamer 🇺🇸 880 110 253ms 21 Nov 2023 592nd edsrzf 🇳🇿 880 110 301ms 28 Nov 2024 592nd targrik 880 110 279ms 30 Jun 2025 596th ovs-code 🇩🇪 878 73 300ms 22 Jul 2023 597th Shanethegamer 🇺🇸 878 81 19ms 19 Dec 2023 597th emgordon154 878 81 26ms 29 Jul 2025 599th GrayJoKing 🇦🇺 877 72 679ms 31 May 2022 599th Shanethegamer 🇺🇸 877 72 646ms 1 Jun 2022 First Prev 526–600 of 3,397 Next Last