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 896th tatzyr 🇯🇵 834 56 10 Dec 2024 902nd moustave 834 67 7 Nov 2024 903rd inverseLorentz 🇦🇺 834 69 3 Jun 2024 903rd CLOStrophobic 🇮🇹 834 69 28 May 2025 905th Shanethegamer 🇺🇸 834 82 15 May 2023 906th dokutan 834 88 9 Jun 2024 907th p-vf 🇨🇭 834 93 24 Jun 2022 907th Smetalo 834 93 25 Aug 2022 907th malworthy 834 93 19 Aug 2024 910th Shanethegamer 🇺🇸 833 57 15 Dec 2022 910th anter69 🇭🇺 833 57 23 Feb 2023 910th stefangimmillaro 833 57 6 May 2023 913th Alex-x90 🇺🇸 833 74 4 Dec 2022 913th undersquire 833 74 24 Jun 2023 913th rdmsr 833 74 24 Jun 2023 913th Bmrl7 833 74 9 Jul 2023 913th Vinterion 833 74 6 Nov 2023 913th namelessiw 833 74 28 Dec 2023 913th Jonatan6 🇩🇰 833 74 15 Mar 2024 913th Mandrzejy 🇵🇱 833 74 12 Apr 2024 913th kaurakeksi 🇫🇮 833 74 29 Dec 2024 922nd nwellnhof 🇩🇪 833 117 16 Nov 2022 923rd Natanaelel 🇸🇪 832 39 10 Feb 2025 924th Steffan153 🇫🇮 832 55 21 Dec 2022 925th elisherer 🇮🇱 832 64 5 Jun 2022 925th Ashikpaul 🇮🇳 832 64 29 Jul 2022 925th LukeBridges 🇬🇧 832 64 26 Oct 2022 925th florton 832 64 18 Jan 2023 925th DayDun 🇸🇪 832 64 24 Jan 2023 925th lyphyser 832 64 3 Jun 2023 925th Davr1 🇨🇿 832 64 14 Oct 2023 925th stellartux 832 64 26 Dec 2023 925th goodwyna21 832 64 12 Nov 2024 925th xShadowBlade 832 64 26 Dec 2024 925th richard-oelze 🇩🇪 832 64 4 Aug 2025 936th MeWhenI 🇻🇦 832 101 5 May 2022 937th ovs-code 🇩🇪 831 60 3 Aug 2024 937th GrayJoKing 🇦🇺 831 60 24 Oct 2024 937th Shanethegamer 🇺🇸 831 60 19 Dec 2024 940th alphafalfa 831 65 23 Aug 2024 941st sean-niemann 🇺🇸 830 67 5 May 2022 941st pschmid0 🇺🇸 830 67 5 Aug 2022 941st arobson13 🇨🇦 830 67 11 Apr 2023 941st janbehrens 🇩🇪 830 67 17 May 2023 945th rollershutter 830 78 8 Jul 2022 945th destofr 830 78 25 Aug 2022 945th 5quiwyrm 830 78 4 Sep 2022 945th thej10n 830 78 12 Jun 2024 945th SwordF-Official 830 78 27 Apr 2025 950th sean-niemann 🇺🇸 829 79 23 Oct 2024 950th DialFrost 🇸🇬 829 79 25 Oct 2024 950th emgordon154 829 79 27 Oct 2024 950th stefangimmillaro 829 79 28 Oct 2024 954th msbranicky 828 100 5 Oct 2023 954th dokutan 828 100 3 Oct 2024 956th tkr-sh 🇫🇷 828 102 20 Aug 2022 956th trist224 🇫🇷 828 102 14 Dec 2022 958th GolfingSuccess 🇬🇷 828 150 18 Jan 2025 958th ovs-code 🇩🇪 828 150 27 Mar 2025 960th DialFrost 🇸🇬 827 86 15 Dec 2024 961st MeWhenI 🇻🇦 827 90 13 Feb 2025 962nd TaserTheFox 🇺🇸 826 54 31 May 2023 963rd trinityy-7 825 94 7 Mar 2024 963rd Squimbletin 825 94 19 Apr 2025 963rd TheZwierzLF 🇵🇱 825 94 2 Jun 2025 966th frankgraziano 824 205 21 Aug 2025 967th Bubbler-4 822 68 15 Nov 2022 967th neel11235813 822 68 31 Dec 2022 967th Rubiksmath 822 68 14 Aug 2023 967th SB-945 822 68 7 Feb 2024 971st RobertHoeh 822 70 28 Jan 2024 971st jamiloBBKing 822 70 31 Jan 2025 973rd AlephSquirrel 822 75 12 Jan 2023 973rd Yewzir 🇧🇪 822 75 22 Apr 2023 973rd Shanethegamer 🇺🇸 822 75 15 May 2023 First Prev 901–975 of 3,355 Next Last