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 825th CatsAreFluffy 846 63 11ms 18 Feb 2023 825th amiralitaheri 846 63 11ms 23 Feb 2023 825th RuyiLi 846 63 11ms 1 Apr 2023 825th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 825th pfysches-boop 846 63 14ms 6 Aug 2023 825th mhgockel 846 63 11ms 19 Aug 2023 825th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 825th 823126 846 63 15ms 14 Nov 2024 825th Palladium02 846 63 9ms 12 May 2025 825th 4very 846 63 11ms 10 Jun 2025 825th gigaprofisi 🇺🇸 846 63 10ms 17 Jun 2025 825th Ultra814 846 63 11ms 21 Aug 2025 838th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 838th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 838th albanian-laundromat 845 57 507ms 7 Oct 2025 841st NewDefectus 🇮🇱 845 73 3ms 6 May 2022 841st inventshah 845 73 3ms 12 Jun 2022 841st Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 841st Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 841st LorenzoDeGaspari 845 73 3ms 27 May 2024 841st Bpc-CPU 845 73 2ms 12 Jul 2025 841st AZTECCO 845 73 3ms 16 Sep 2025 841st CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 849th lynn 845 96 30ms 11 Jul 2023 850th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 850th emgordon154 845 98 121ms 18 Feb 2025 852nd jared-hughes 845 100 64ms 20 Jul 2022 852nd ZakkkkAttackkkk 🇵🇭 845 100 74ms 10 Aug 2022 852nd Walter225 845 100 64ms 25 Jul 2023 855th retrohun 844 64 6ms 6 Nov 2022 855th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 855th stellartux 844 64 5ms 26 Dec 2023 855th bac0id 844 64 5ms 29 Jun 2024 855th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 855th albanian-laundromat 844 64 5ms 22 Sep 2025 861st janAkali 🇷🇺 843 77 118ms 12 Feb 2025 862nd bschorno 843 92 337ms 12 Oct 2022 862nd ChrisTheisen 843 92 374ms 14 Dec 2022 862nd kellantech 843 92 333ms 4 Jul 2023 862nd Mezzofloat 843 92 286ms 26 Aug 2023 862nd Maximizer02 843 92 291ms 1 Oct 2023 862nd madeforlosers 843 92 296ms 21 Nov 2024 862nd ChromaChroma 843 92 342ms 7 Oct 2025 862nd snoozingnewt 🇺🇸 843 92 363ms 8 Oct 2025 870th DialFrost 🇸🇬 843 162 1,829ms 13 Sep 2025 870th emgordon154 843 162 1,897ms 17 Sep 2025 872nd DialFrost 🇸🇬 842 66 83ms 7 Apr 2025 873rd SirBogman 🇺🇸 842 89 51ms 4 May 2022 874th dokutan 842 93 428ms 27 Sep 2025 875th KatieLG 🇬🇧 842 115 275ms 25 Sep 2022 875th emgordon154 842 115 256ms 17 Jan 2025 877th krcs 🇵🇱 841 53 242ms 9 May 2022 877th ryanlanegit 841 53 287ms 19 Jun 2022 877th sisyphus-ppcg 🇦🇺 841 53 388ms 15 Aug 2022 880th raszpi 🇭🇺 840 77 128ms 1 Sep 2023 881st error256 840 81 75ms 13 Sep 2024 882nd eshilo-draper 839 75 104ms 6 Sep 2022 882nd kmathis22 839 75 94ms 5 Sep 2025 884th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 885th frankgraziano 838 66 5ms 20 Apr 2025 886th CLOStrophobic 🇮🇹 838 89 40ms 14 Feb 2025 887th emplv 🇱🇻 838 124 27ms 31 Oct 2022 888th Codsilla 🇨🇦 837 51 263ms 1 Jul 2022 889th Andriamanitra 🇫🇮 837 83 13ms 17 Apr 2023 889th Natanaelel 🇸🇪 837 83 13ms 8 Jul 2023 891st Steffan153 🇫🇮 837 97 33ms 18 Jan 2023 892nd CatsAreFluffy 837 101 65ms 18 Feb 2023 892nd annaproxy 837 101 85ms 9 May 2023 892nd wojtekmal 837 101 68ms 15 Nov 2023 892nd HumanoidCPU 837 101 63ms 6 May 2024 892nd eMGeeneer 837 101 410ms 27 Jun 2024 892nd bac0id 837 101 65ms 29 Jun 2024 892nd michaelmoynihan 837 101 374ms 3 Sep 2025 892nd snoozingnewt 🇺🇸 837 101 390ms 6 Oct 2025 900th ovs-code 🇩🇪 836 85 17ms 11 Dec 2023 First Prev 826–900 of 3,400 Next Last