Collatz in all languages in bytes. 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 Bytes Time Submitted 750th bstrat 871 35 10ms 6 Jun 2024 750th wh3n3v3r 🇨🇿 871 35 9ms 18 Nov 2024 753rd scpchicken 🇵🇼 871 45 349ms 4 May 2022 753rd SirBogman 🇺🇸 871 45 241ms 5 May 2022 755th Andriamanitra 🇫🇮 871 54 42ms 21 Jul 2022 755th jared-hughes 871 54 39ms 12 Sep 2022 755th OhmNomNom 871 54 47ms 7 Oct 2022 755th olleicua 🇺🇸 871 54 41ms 21 Jan 2024 755th LostSyntax21 🇬🇧 871 54 41ms 12 Mar 2025 755th AbrahamJLR 🇻🇪 871 54 40ms 4 Jun 2025 755th vishal-mohanty 871 54 42ms 25 Aug 2025 762nd TFeld00 🇩🇰 871 71 25ms 17 May 2022 762nd DialFrost 🇸🇬 871 71 36ms 15 Nov 2022 762nd StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 762nd nstearns96 🇬🇧 871 71 19ms 11 Jan 2023 762nd hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 762nd anter69 🇭🇺 871 71 18ms 21 May 2024 762nd rucin93 🇵🇱 871 71 17ms 10 Jul 2024 762nd lelbal 871 71 18ms 26 Aug 2025 762nd HETHAT 🇩🇿 871 71 24ms 23 Sep 2025 762nd 09cf 871 71 17ms 46 mins ago 772nd MeWhenI 🇻🇦 871 85 44ms 27 Jun 2022 772nd Shanethegamer 🇺🇸 871 85 42ms 15 May 2023 772nd albanian-laundromat 871 85 45ms 25 Aug 2025 775th CaedenHarper 🇨🇦 869 60 710ms 28 Sep 2025 776th GrayJoKing 🇦🇺 869 67 80ms 8 Feb 2025 777th Steffan153 🇫🇮 869 82 1,270ms 23 Feb 2023 778th Frowny 868 38 43ms 5 May 2022 778th stackofbears 868 38 53ms 14 Mar 2025 780th steffan-polygolf 868 73 85ms 23 Feb 2023 780th MWI-polygolf 868 73 81ms 6 Dec 2023 780th HumanoidCPU 868 73 80ms 7 May 2024 783rd mtirado1 868 75 8ms 13 Aug 2022 784th stefangimmillaro 868 112 259ms 26 Sep 2023 784th kkoenig 868 112 256ms 4 Jan 2024 786th ovs-code 🇩🇪 868 133 42ms 8 Jul 2024 787th pardouin 🇫🇷 867 61 135ms 7 Aug 2024 788th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 788th Betuaredead 867 92 468ms 5 Jan 2023 788th emgordon154 867 92 427ms 27 May 2025 788th Yax42 🇫🇷 867 92 420ms 4 Oct 2025 792nd TylerBloom 866 96 127ms 22 Mar 2024 793rd 5quiwyrm 865 52 242ms 4 Sep 2022 793rd MeWhenI 🇻🇦 865 52 265ms 28 Jan 2023 793rd Feniske 🇫🇷 865 52 251ms 7 Nov 2023 793rd dcgjb 865 52 300ms 29 Jan 2024 793rd JPRuskin 🇬🇧 865 52 254ms 7 Apr 2025 793rd IISResetMe 865 52 268ms 7 Apr 2025 793rd Ripick 865 52 265ms 1 Jun 2025 800th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 801st bac0id 865 90 363ms 26 Sep 2023 801st deadp4nda 🇩🇪 865 90 343ms 26 Apr 2024 801st 123mjb 865 90 346ms 23 Jun 2025 801st michelebastione 🇮🇹 865 90 314ms 24 Aug 2025 801st razvandmtr 🇷🇴 865 90 305ms 12 days ago 806th shellbertt 🇨🇦 865 98 55ms 9 May 2022 806th iakolzin 865 98 54ms 26 May 2022 806th Betuaredead 865 98 56ms 5 Jan 2023 806th oceko 865 98 55ms 19 Feb 2024 806th dokutan 865 98 54ms 17 Mar 2024 806th cuzdav 865 98 57ms 4 May 2025 806th timhaj 🇸🇮 865 98 55ms 12 Sep 2025 806th Yax42 🇫🇷 865 98 53ms 4 Oct 2025 814th Andriamanitra 🇫🇮 864 67 159ms 26 Apr 2023 815th DialFrost 🇸🇬 864 86 20ms 15 Dec 2024 816th Setvizan 863 62 10ms 12 Jan 2023 816th GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 816th arctouch-cristiannevianna 863 62 13ms 3 Apr 2023 816th Corxldyphik 863 62 13ms 11 Apr 2023 816th Blockyheadman 863 62 10ms 1 Nov 2023 816th ollyspooner 863 62 10ms 22 Nov 2023 816th itserasmus 863 62 13ms 25 Jan 2024 816th Jacob385 863 62 10ms 13 Mar 2024 816th junkondo-jp 863 62 10ms 30 Jun 2024 816th ShiraJoseph 🇺🇸 863 62 11ms 1 Mar 2025 First Prev 751–825 of 3,471 Next Last