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 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 Snake Sphenic Numbers Trinomial Triangle 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 901st error256 838 81 13 Sep 2024 902nd Codsilla 🇨🇦 837 51 1 Jul 2022 903rd CatsAreFluffy 836 101 18 Feb 2023 903rd annaproxy 836 101 9 May 2023 903rd wojtekmal 836 101 15 Nov 2023 903rd HumanoidCPU 836 101 6 May 2024 903rd eMGeeneer 836 101 27 Jun 2024 903rd bac0id 836 101 29 Jun 2024 903rd michaelmoynihan 836 101 2 days ago 910th RyanMHsiao 836 159 24 Sep 2024 911th scpchicken 🇵🇼 835 55 4 May 2022 911th SirBogman 🇺🇸 835 55 5 May 2022 911th Shanethegamer 🇺🇸 835 55 19 May 2023 911th DialFrost 🇸🇬 835 55 14 Feb 2025 915th Yewzir 🇧🇪 835 69 24 Dec 2024 916th Andriamanitra 🇫🇮 835 83 17 Apr 2023 916th Natanaelel 🇸🇪 835 83 8 Jul 2023 918th CLOStrophobic 🇮🇹 835 89 14 Feb 2025 919th Steffan153 🇫🇮 835 97 18 Jan 2023 920th SirBogman 🇺🇸 834 36 5 May 2022 920th HPWiz 🇳🇿 834 36 7 May 2022 920th Natanaelel 🇸🇪 834 36 15 Jun 2022 920th Steffan153 🇫🇮 834 36 18 Jan 2023 920th codereport 🇨🇦 834 36 1 Jun 2024 920th GolfinK 834 36 21 Nov 2024 920th lifthrasiir 🇰🇷 834 36 1 Dec 2024 920th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 928th ChiefChippy2 834 56 4 May 2022 928th aksyristos 834 56 29 Jan 2023 928th anter69 🇭🇺 834 56 12 Feb 2024 928th 3dm4n 🇫🇮 834 56 11 Mar 2024 928th lgrandco 834 56 9 Oct 2024 928th tatzyr 🇯🇵 834 56 10 Dec 2024 934th moustave 834 67 7 Nov 2024 935th inverseLorentz 🇦🇺 834 69 3 Jun 2024 935th CLOStrophobic 🇮🇹 834 69 28 May 2025 937th ovs-code 🇩🇪 834 85 11 Dec 2023 938th p-vf 🇨🇭 834 93 24 Jun 2022 938th Smetalo 834 93 25 Aug 2022 938th malworthy 834 93 19 Aug 2024 941st emplv 🇱🇻 834 124 31 Oct 2022 942nd Alex-x90 🇺🇸 833 74 4 Dec 2022 942nd undersquire 833 74 24 Jun 2023 942nd rdmsr 833 74 24 Jun 2023 942nd Bmrl7 833 74 9 Jul 2023 942nd Vinterion 833 74 6 Nov 2023 942nd namelessiw 833 74 28 Dec 2023 942nd Jonatan6 🇩🇰 833 74 15 Mar 2024 942nd Mandrzejy 🇵🇱 833 74 12 Apr 2024 942nd kaurakeksi 🇫🇮 833 74 29 Dec 2024 951st Shanethegamer 🇺🇸 833 82 15 May 2023 952nd dokutan 833 88 9 Jun 2024 953rd nwellnhof 🇩🇪 833 117 16 Nov 2022 954th Steffan153 🇫🇮 832 55 21 Dec 2022 955th Shanethegamer 🇺🇸 832 57 15 Dec 2022 955th anter69 🇭🇺 832 57 23 Feb 2023 955th stefangimmillaro 832 57 6 May 2023 958th elisherer 🇮🇱 832 64 5 Jun 2022 958th Ashikpaul 🇮🇳 832 64 29 Jul 2022 958th LukeBridges 🇬🇧 832 64 26 Oct 2022 958th florton 832 64 18 Jan 2023 958th DayDun 🇸🇪 832 64 24 Jan 2023 958th lyphyser 832 64 3 Jun 2023 958th Davr1 🇨🇿 832 64 14 Oct 2023 958th stellartux 832 64 26 Dec 2023 958th goodwyna21 832 64 12 Nov 2024 958th xShadowBlade 832 64 26 Dec 2024 958th richard-oelze 🇩🇪 832 64 4 Aug 2025 969th MeWhenI 🇻🇦 832 101 5 May 2022 970th Natanaelel 🇸🇪 830 39 10 Feb 2025 971st ovs-code 🇩🇪 830 60 3 Aug 2024 971st GrayJoKing 🇦🇺 830 60 24 Oct 2024 971st Shanethegamer 🇺🇸 830 60 19 Dec 2024 974th alphafalfa 830 65 23 Aug 2024 975th yashima 830 141 19 Oct 2024 Prev 901–975 of 3,297 Next