Collatz in JavaScript 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 Submitted 144th NickTheEASDude 🇺🇸 873 63 11ms 18 Jan 2024 144th 823126 873 63 15ms 14 Nov 2024 144th Palladium02 873 63 9ms 12 May 2025 144th 4very 873 63 11ms 10 Jun 2025 144th gigaprofisi 🇺🇸 873 63 17 Jun 2025 144th Ultra814 873 63 11ms 21 Aug 2025 157th elisherer 🇮🇱 859 64 10ms 5 Jun 2022 157th Ashikpaul 🇮🇳 859 64 10ms 29 Jul 2022 157th LukeBridges 🇬🇧 859 64 12ms 26 Oct 2022 157th florton 859 64 11ms 18 Jan 2023 157th DayDun 🇸🇪 859 64 11ms 24 Jan 2023 157th lyphyser 859 64 13ms 3 Jun 2023 157th Davr1 🇨🇿 859 64 11ms 14 Oct 2023 157th stellartux 859 64 12ms 26 Dec 2023 157th goodwyna21 859 64 9ms 12 Nov 2024 157th xShadowBlade 859 64 10ms 26 Dec 2024 157th richard-oelze 🇩🇪 859 64 11ms 4 Aug 2025 168th wansacis 🇩🇪 846 65 9ms 13 May 2022 168th krcs 🇵🇱 846 65 12ms 24 Nov 2022 168th ejini6969 846 65 9ms 1 Apr 2023 168th InspectorBoat 846 65 11ms 25 Oct 2023 168th jake6192 846 65 11ms 20 May 2025 168th LordSir101 846 65 11ms 11 Aug 2025 174th ChiefChippy2 833 66 13ms 4 May 2022 174th Radwatch 833 66 11ms 22 Jun 2022 174th TheCod-r 🇦🇶 833 66 11ms 10 Oct 2022 174th MadScience137 833 66 17 Oct 2022 174th nayakrujul 833 66 14ms 12 Mar 2023 174th HenryTy83 833 66 11ms 3 May 2023 174th charliegaming 833 66 11ms 3 Oct 2023 174th mobibluman 833 66 14ms 16 Oct 2023 174th azka1368 833 66 12ms 23 Nov 2023 174th thej10n 833 66 10ms 13 Jun 2024 174th Florian-Mt 833 66 10ms 22 Jul 2024 174th deancureton 833 66 10ms 29 Dec 2024 174th Quadruplay 833 66 11ms 12 Jul 2025 187th inverseLorentz 🇦🇺 821 67 11ms 25 Jun 2022 187th maxpelic 🇺🇸 821 67 13ms 5 Jul 2022 187th vroup 🇩🇰 821 67 11ms 29 Sep 2022 187th Bodo171 821 67 11ms 1 Dec 2022 187th Inbarw100 821 67 11ms 10 Jun 2023 187th raszpi 🇭🇺 821 67 13ms 1 Sep 2023 187th dijs 821 67 11ms 8 Mar 2024 187th yb1yb1 821 67 6 Oct 2024 187th smclaughlin-cf 821 67 11ms 25 Feb 2025 187th 52525rr 821 67 2 days ago 197th Smetalo 809 68 10ms 25 Aug 2022 197th TheRealOhead 🇺🇸 809 68 10ms 23 Nov 2022 197th b10011 🇫🇮 809 68 10ms 27 Dec 2022 197th RasmusBV 809 68 11ms 19 Feb 2023 197th joakim-ronning 809 68 11ms 24 May 2023 197th TRexOnGit 809 68 11ms 31 Jan 2024 203rd adoxography 797 69 11ms 13 Jul 2022 203rd eshilo-draper 797 69 11ms 5 Oct 2022 203rd 2pichar 797 69 11ms 11 Nov 2022 203rd jorbDehmel 🇺🇸 797 69 13ms 17 Jun 2023 207th Jaro32768 🇸🇰 786 70 10ms 8 Feb 2024 207th Alex-Huggett 🇬🇧 786 70 10ms 15 Apr 2024 207th Moreallure 786 70 12ms 5 May 2024 207th AnnoyedArt1256 786 70 13ms 3 Jul 2025 211th destofr 775 71 11ms 25 Aug 2022 211th pyuraii 775 71 11ms 27 Sep 2022 211th kydogia 775 71 12ms 18 Oct 2022 211th jquade7 775 71 13ms 27 May 2023 211th SniperSmiley 🇺🇸 775 71 11ms 7 Apr 2024 211th dbkirk4211 775 71 11ms 3 May 2024 217th coolCucumber-cat 764 72 10ms 20 Mar 2023 217th mrmena 🇦🇺 764 72 11ms 19 Mar 2024 217th sulphemi 764 72 11ms 3 Apr 2025 220th gurglemurgle5 753 73 11ms 12 May 2022 220th adamnielson42 🇺🇸 753 73 14ms 24 Apr 2023 220th fourth-bit 753 73 18ms 23 Jun 2023 220th efgen 753 73 11ms 28 Jun 2023 220th AlbatrossBay 753 73 14ms 8 Oct 2024 220th ComputerKWasTaken 🇺🇸 753 73 10ms 20 Jan 2025 First Prev 151–225 of 265 Next Last