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 Submitted 749th Natanaelel 🇸🇪 858 41 420ms 4 May 2022 752nd MeWhenI 🇻🇦 858 81 8ms 23 May 2023 753rd 5quiwyrm 857 52 242ms 4 Sep 2022 753rd MeWhenI 🇻🇦 857 52 265ms 28 Jan 2023 753rd Feniske 🇫🇷 857 52 251ms 7 Nov 2023 753rd dcgjb 857 52 300ms 29 Jan 2024 753rd JPRuskin 🇬🇧 857 52 254ms 7 Apr 2025 753rd IISResetMe 857 52 268ms 7 Apr 2025 753rd Ripick 857 52 265ms 1 Jun 2025 760th jared-hughes 857 72 3ms 6 Jul 2022 760th Steffan153 🇫🇮 857 72 3ms 3 Jan 2023 760th MeWhenI 🇻🇦 857 72 2ms 7 May 2023 760th ListeriaM 857 72 2ms 22 Aug 2023 760th larcherMTT 857 72 3ms 5 Oct 2024 760th snyderek 🇺🇸 857 72 3ms 19 Feb 2025 760th 5quiwyrm 857 72 3ms 29 Jun 2025 760th TeodorDyakov 🇧🇬 857 72 2ms 8 Jul 2025 760th xiaoyiming123 857 72 2ms 12 Jul 2025 769th MeWhenI 🇻🇦 857 145 961ms 28 Mar 2025 770th ovs-code 🇩🇪 856 83 63ms 1 Jul 2024 771st Liibe 856 97 446ms 25 Sep 2025 771st Schmitt-Very-Cool 856 97 496ms 27 days ago 773rd typeswitch-dev 🇵🇹 855 75 5ms 22 Jul 2023 774th 386asm 🇺🇸 855 86 45ms 9 Apr 2023 775th Frowny 854 38 43ms 5 May 2022 775th stackofbears 854 38 53ms 14 Mar 2025 777th DialFrost 🇸🇬 854 50 263ms 24 Oct 2023 778th MeWhenI 🇻🇦 854 71 110ms 13 Dec 2022 779th frankgraziano 854 198 139ms 9 days ago 780th eshilo-draper 853 91 348ms 4 Sep 2022 780th ericlangedijk 🇸🇮 853 91 387ms 23 May 2023 780th KatieLG 🇬🇧 853 91 356ms 30 Apr 2024 780th Mikey-Beep 🇬🇧 853 91 345ms 3 Sep 2024 784th henrydukepickle 853 97 171ms 8 Jul 2025 785th yeminghan2021 853 99 61ms 3 Feb 2025 786th o0lit3 🇺🇸 851 54 8ms 22 Jun 2023 786th Natanaelel 🇸🇪 851 54 8ms 10 Feb 2025 788th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 788th MeWhenI 🇻🇦 851 65 4ms 10 Oct 2023 790th frosster 851 76 7ms 12 May 2023 790th kyleclaassen 851 76 11ms 20 May 2023 790th NickTheEASDude 🇺🇸 851 76 6ms 7 May 2024 790th koipondx86 851 76 8ms 8 Nov 2024 794th Shanethegamer 🇺🇸 851 83 1,232ms 4 May 2022 795th MeWhenI 🇻🇦 851 92 398ms 10 Oct 2022 795th Betuaredead 851 92 468ms 5 Jan 2023 795th emgordon154 851 92 427ms 27 May 2025 795th Yax42 🇫🇷 851 92 420ms 19 days ago 799th mtirado1 850 74 95ms 24 Dec 2022 799th Betuaredead 850 74 86ms 6 Jan 2023 799th KatieLG 🇬🇧 850 74 95ms 15 Jan 2023 799th bwat2 850 74 99ms 31 Mar 2023 799th stackotter 850 74 92ms 29 May 2023 799th ovs-code 🇩🇪 850 74 112ms 17 Apr 2024 799th madeforlosers 850 74 89ms 21 Nov 2024 806th SirBogman 🇺🇸 849 55 43ms 5 May 2022 806th olivermrose 🇺🇸 849 55 45ms 6 May 2022 806th 4hg 🇺🇸 849 55 46ms 24 Aug 2022 806th DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 806th error256 849 55 43ms 4 May 2024 811th Shanethegamer 🇺🇸 849 58 1,081ms 17 Sep 2025 812th Shanethegamer 🇺🇸 849 99 27ms 27 Apr 2023 813th Grrisly 849 114 295ms 25 Mar 2024 814th JayXon 🇺🇸 848 56 998ms 9 May 2022 815th the-zammers 847 68 188ms 2 Oct 2023 816th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 816th AlephSquirrel 846 26 141ms 6 Jan 2023 816th ovs-code 🇩🇪 846 26 524ms 5 May 2024 816th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 820th randolchance 846 63 11ms 8 Jan 2023 820th CatsAreFluffy 846 63 11ms 18 Feb 2023 820th amiralitaheri 846 63 11ms 23 Feb 2023 820th RuyiLi 846 63 11ms 1 Apr 2023 820th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 820th pfysches-boop 846 63 14ms 6 Aug 2023 First Prev 751–825 of 3,386 Next Last