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 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 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 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 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 900th Natanaelel 🇸🇪 838 83 11ms 8 Jul 2023 902nd emplv 🇱🇻 838 124 27ms 31 Oct 2022 903rd MeWhenI 🇻🇦 838 164 1,609ms 12 days ago 904th ovs-code 🇩🇪 837 85 17ms 11 Dec 2023 905th Steffan153 🇫🇮 837 97 33ms 18 Jan 2023 906th CatsAreFluffy 837 101 75ms 18 Feb 2023 906th annaproxy 837 101 54ms 9 May 2023 906th wojtekmal 837 101 53ms 15 Nov 2023 906th HumanoidCPU 837 101 51ms 6 May 2024 906th eMGeeneer 837 101 363ms 27 Jun 2024 906th bac0id 837 101 53ms 29 Jun 2024 906th michaelmoynihan 837 101 387ms 3 Sep 2025 906th snoozingnewt 🇺🇸 837 101 371ms 6 Oct 2025 914th dokutan 836 88 49ms 9 Jun 2024 915th SirBogman 🇺🇸 835 36 9ms 5 May 2022 915th Natanaelel 🇸🇪 835 36 90ms 15 Jun 2022 915th Steffan153 🇫🇮 835 36 91ms 18 Jan 2023 915th codereport 🇨🇦 835 36 9ms 1 Jun 2024 915th GolfinK 835 36 9ms 21 Nov 2024 915th lifthrasiir 🇰🇷 835 36 9ms 1 Dec 2024 915th GolfingSuccess 🇬🇷 835 36 12ms 20 Mar 2025 922nd scpchicken 🇵🇼 835 55 11ms 4 May 2022 922nd SirBogman 🇺🇸 835 55 8ms 5 May 2022 922nd Shanethegamer 🇺🇸 835 55 6ms 19 May 2023 922nd DialFrost 🇸🇬 835 55 11ms 14 Feb 2025 926th inverseLorentz 🇦🇺 835 69 176ms 3 Jun 2024 926th Yewzir 🇧🇪 835 69 110ms 24 Dec 2024 926th CLOStrophobic 🇮🇹 835 69 174ms 28 May 2025 929th Re-Adventures 🇮🇳 835 116 260ms 16 Jul 2023 929th Yewzir 🇧🇪 835 116 256ms 7 Feb 2024 931st ChiefChippy2 834 56 39ms 4 May 2022 931st aksyristos 834 56 41ms 29 Jan 2023 931st anter69 🇭🇺 834 56 39ms 12 Feb 2024 931st 3dm4n 🇫🇮 834 56 52ms 11 Mar 2024 931st lgrandco 834 56 41ms 9 Oct 2024 931st tatzyr 🇯🇵 834 56 40ms 10 Dec 2024 937th moustave 834 67 22ms 7 Nov 2024 938th Alex-x90 🇺🇸 834 74 2ms 4 Dec 2022 938th undersquire 834 74 3ms 24 Jun 2023 938th rdmsr 834 74 2ms 24 Jun 2023 938th Bmrl7 834 74 3ms 9 Jul 2023 938th Vinterion 834 74 3ms 6 Nov 2023 938th namelessiw 834 74 3ms 28 Dec 2023 938th Jonatan6 🇩🇰 834 74 3ms 15 Mar 2024 938th Mandrzejy 🇵🇱 834 74 5ms 12 Apr 2024 938th kaurakeksi 🇫🇮 834 74 3ms 29 Dec 2024 947th Shanethegamer 🇺🇸 834 82 155ms 15 May 2023 948th p-vf 🇨🇭 834 93 317ms 24 Jun 2022 948th Smetalo 834 93 315ms 25 Aug 2022 948th malworthy 834 93 329ms 19 Aug 2024 951st Natanaelel 🇸🇪 833 39 196ms 10 Feb 2025 952nd Steffan153 🇫🇮 833 55 78ms 21 Dec 2022 953rd Shanethegamer 🇺🇸 833 57 1,051ms 15 Dec 2022 953rd anter69 🇭🇺 833 57 876ms 23 Feb 2023 953rd stefangimmillaro 833 57 891ms 6 May 2023 956th elisherer 🇮🇱 833 64 15ms 5 Jun 2022 956th Ashikpaul 🇮🇳 833 64 9ms 29 Jul 2022 956th LukeBridges 🇬🇧 833 64 11ms 26 Oct 2022 956th florton 833 64 14ms 18 Jan 2023 956th DayDun 🇸🇪 833 64 10ms 24 Jan 2023 956th lyphyser 833 64 10ms 3 Jun 2023 956th Davr1 🇨🇿 833 64 10ms 14 Oct 2023 956th stellartux 833 64 10ms 26 Dec 2023 956th goodwyna21 833 64 10ms 12 Nov 2024 956th xShadowBlade 833 64 10ms 26 Dec 2024 956th richard-oelze 🇩🇪 833 64 13ms 4 Aug 2025 967th MeWhenI 🇻🇦 833 101 26ms 5 May 2022 968th nwellnhof 🇩🇪 833 117 1,569ms 16 Nov 2022 969th MeWhenI 🇻🇦 832 90 40ms 13 Feb 2025 970th ovs-code 🇩🇪 831 60 140ms 3 Aug 2024 970th GrayJoKing 🇦🇺 831 60 142ms 24 Oct 2024 970th Shanethegamer 🇺🇸 831 60 139ms 19 Dec 2024 973rd alphafalfa 831 65 5ms 23 Aug 2024 974th StronkCheese2 831 100 345ms 7 days ago 975th sean-niemann 🇺🇸 830 67 10ms 5 May 2022 First Prev 901–975 of 3,451 Next Last