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 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 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 749th bac0id 860 65 19ms 26 Sep 2023 749th mossiegoat 860 65 21ms 8 Jun 2025 749th RaBa21 🇭🇺 860 65 23ms 11 Jul 2025 749th TransformLikeATensor 860 65 20ms 17 Oct 2025 755th GrayJoKing 🇦🇺 860 67 80ms 8 Feb 2025 756th Andriamanitra 🇫🇮 859 67 159ms 26 Apr 2023 757th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 758th MeWhenI 🇻🇦 859 145 1,470ms 28 Mar 2025 759th ulucs 858 35 9ms 8 May 2022 759th bstrat 858 35 9ms 6 Jun 2024 759th wh3n3v3r 🇨🇿 858 35 8ms 18 Nov 2024 762nd JRaspass 🇬🇧 858 41 416ms 4 May 2022 762nd SirBogman 🇺🇸 858 41 304ms 4 May 2022 762nd Natanaelel 🇸🇪 858 41 420ms 4 May 2022 765th 5quiwyrm 858 52 242ms 4 Sep 2022 765th MeWhenI 🇻🇦 858 52 265ms 28 Jan 2023 765th Feniske 🇫🇷 858 52 251ms 7 Nov 2023 765th dcgjb 858 52 300ms 29 Jan 2024 765th JPRuskin 🇬🇧 858 52 254ms 7 Apr 2025 765th IISResetMe 858 52 268ms 7 Apr 2025 765th Ripick 858 52 265ms 1 Jun 2025 772nd Yewzir 🇧🇪 858 160 1,672ms 33 hours ago 773rd jared-hughes 857 72 3ms 6 Jul 2022 773rd Steffan153 🇫🇮 857 72 3ms 3 Jan 2023 773rd MeWhenI 🇻🇦 857 72 2ms 7 May 2023 773rd ListeriaM 857 72 2ms 22 Aug 2023 773rd larcherMTT 857 72 3ms 5 Oct 2024 773rd snyderek 🇺🇸 857 72 3ms 19 Feb 2025 773rd 5quiwyrm 857 72 3ms 29 Jun 2025 773rd TeodorDyakov 🇧🇬 857 72 2ms 8 Jul 2025 773rd xiaoyiming123 857 72 2ms 12 Jul 2025 782nd ovs-code 🇩🇪 856 83 63ms 1 Jul 2024 783rd Liibe 856 97 334ms 25 Sep 2025 783rd Schmitt-Very-Cool 856 97 336ms 26 Sep 2025 785th frankgraziano 856 198 102ms 14 Oct 2025 786th Frowny 855 38 43ms 5 May 2022 786th stackofbears 855 38 53ms 14 Mar 2025 788th typeswitch-dev 🇵🇹 855 75 5ms 22 Jul 2023 789th 386asm 🇺🇸 855 86 45ms 9 Apr 2023 790th DialFrost 🇸🇬 854 50 263ms 24 Oct 2023 791st MeWhenI 🇻🇦 854 71 96ms 13 Dec 2022 792nd henrydukepickle 854 97 128ms 8 Jul 2025 793rd yeminghan2021 854 99 56ms 3 Feb 2025 794th eshilo-draper 853 91 348ms 4 Sep 2022 794th ericlangedijk 🇸🇮 853 91 387ms 23 May 2023 794th KatieLG 🇬🇧 853 91 356ms 30 Apr 2024 794th Mikey-Beep 🇬🇧 853 91 345ms 3 Sep 2024 798th ovs-code 🇩🇪 853 161 1,597ms 14 Sep 2025 799th frosster 852 76 7ms 12 May 2023 799th kyleclaassen 852 76 11ms 20 May 2023 799th NickTheEASDude 🇺🇸 852 76 6ms 7 May 2024 799th koipondx86 852 76 8ms 8 Nov 2024 803rd Shanethegamer 🇺🇸 852 83 1,316ms 4 May 2022 804th MeWhenI 🇻🇦 852 92 398ms 10 Oct 2022 804th Betuaredead 852 92 468ms 5 Jan 2023 804th emgordon154 852 92 427ms 27 May 2025 804th Yax42 🇫🇷 852 92 420ms 4 Oct 2025 808th o0lit3 🇺🇸 851 54 8ms 22 Jun 2023 808th Natanaelel 🇸🇪 851 54 8ms 10 Feb 2025 810th Shanethegamer 🇺🇸 851 58 790ms 17 Sep 2025 811th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 811th MeWhenI 🇻🇦 851 65 4ms 10 Oct 2023 813th mtirado1 850 74 73ms 24 Dec 2022 813th Betuaredead 850 74 77ms 6 Jan 2023 813th KatieLG 🇬🇧 850 74 79ms 15 Jan 2023 813th bwat2 850 74 80ms 31 Mar 2023 813th stackotter 850 74 77ms 29 May 2023 813th ovs-code 🇩🇪 850 74 79ms 17 Apr 2024 813th madeforlosers 850 74 76ms 21 Nov 2024 820th Shanethegamer 🇺🇸 850 99 27ms 27 Apr 2023 821st SirBogman 🇺🇸 849 55 43ms 5 May 2022 821st olivermrose 🇺🇸 849 55 45ms 6 May 2022 821st 4hg 🇺🇸 849 55 46ms 24 Aug 2022 821st DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 821st error256 849 55 43ms 4 May 2024 First Prev 751–825 of 3,440 Next Last