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 Continued Fractions 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 Continued Fractions 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 751st DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 752nd dieggsy 872 97 41ms 8 Oct 2024 753rd ulucs 871 35 9ms 8 May 2022 753rd bstrat 871 35 10ms 6 Jun 2024 753rd wh3n3v3r 🇨🇿 871 35 9ms 18 Nov 2024 756th scpchicken 🇵🇼 871 45 349ms 4 May 2022 756th SirBogman 🇺🇸 871 45 241ms 5 May 2022 758th Andriamanitra 🇫🇮 871 54 42ms 21 Jul 2022 758th jared-hughes 871 54 39ms 12 Sep 2022 758th OhmNomNom 871 54 47ms 7 Oct 2022 758th olleicua 🇺🇸 871 54 41ms 21 Jan 2024 758th LostSyntax21 🇬🇧 871 54 41ms 12 Mar 2025 758th AbrahamJLR 🇻🇪 871 54 40ms 4 Jun 2025 758th vishal-mohanty 871 54 42ms 25 Aug 2025 765th TFeld00 🇩🇰 871 71 25ms 17 May 2022 765th DialFrost 🇸🇬 871 71 36ms 15 Nov 2022 765th StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 765th nstearns96 🇬🇧 871 71 19ms 11 Jan 2023 765th hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 765th anter69 🇭🇺 871 71 18ms 21 May 2024 765th rucin93 🇵🇱 871 71 17ms 10 Jul 2024 765th lelbal 871 71 18ms 26 Aug 2025 765th HETHAT 🇩🇿 871 71 24ms 23 Sep 2025 765th 09cf 871 71 17ms 5 days ago 775th MeWhenI 🇻🇦 871 85 44ms 27 Jun 2022 775th Shanethegamer 🇺🇸 871 85 42ms 15 May 2023 775th albanian-laundromat 871 85 45ms 25 Aug 2025 778th CaedenHarper 🇨🇦 869 60 710ms 28 Sep 2025 779th GrayJoKing 🇦🇺 869 67 80ms 8 Feb 2025 780th Steffan153 🇫🇮 869 82 1,270ms 23 Feb 2023 781st ovs-code 🇩🇪 869 133 42ms 8 Jul 2024 782nd Frowny 868 38 43ms 5 May 2022 782nd stackofbears 868 38 53ms 14 Mar 2025 784th steffan-polygolf 868 73 79ms 23 Feb 2023 784th MWI-polygolf 868 73 73ms 6 Dec 2023 784th HumanoidCPU 868 73 80ms 7 May 2024 787th mtirado1 868 75 8ms 13 Aug 2022 788th 123mjb 868 96 346ms 3 days ago 788th noescareno 868 96 344ms 43 hours ago 790th stefangimmillaro 868 112 259ms 26 Sep 2023 790th kkoenig 868 112 256ms 4 Jan 2024 792nd pardouin 🇫🇷 867 61 135ms 7 Aug 2024 793rd MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 793rd Betuaredead 867 92 468ms 5 Jan 2023 793rd emgordon154 867 92 427ms 27 May 2025 793rd Yax42 🇫🇷 867 92 420ms 4 Oct 2025 797th TylerBloom 866 96 127ms 22 Mar 2024 798th 5quiwyrm 865 52 279ms 4 Sep 2022 798th MeWhenI 🇻🇦 865 52 261ms 28 Jan 2023 798th Feniske 🇫🇷 865 52 208ms 7 Nov 2023 798th dcgjb 865 52 251ms 29 Jan 2024 798th JPRuskin 🇬🇧 865 52 290ms 7 Apr 2025 798th IISResetMe 865 52 259ms 7 Apr 2025 798th Ripick 865 52 261ms 1 Jun 2025 805th Andriamanitra 🇫🇮 865 67 159ms 26 Apr 2023 806th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 807th bac0id 865 90 320ms 26 Sep 2023 807th deadp4nda 🇩🇪 865 90 315ms 26 Apr 2024 807th 123mjb 865 90 321ms 23 Jun 2025 807th michelebastione 🇮🇹 865 90 365ms 24 Aug 2025 807th razvandmtr 🇷🇴 865 90 493ms 17 days ago 812th shellbertt 🇨🇦 865 98 55ms 9 May 2022 812th iakolzin 865 98 52ms 26 May 2022 812th Betuaredead 865 98 53ms 5 Jan 2023 812th oceko 865 98 55ms 19 Feb 2024 812th dokutan 865 98 55ms 17 Mar 2024 812th cuzdav 865 98 53ms 4 May 2025 812th timhaj 🇸🇮 865 98 56ms 12 Sep 2025 812th Yax42 🇫🇷 865 98 53ms 4 Oct 2025 820th DialFrost 🇸🇬 864 86 20ms 15 Dec 2024 821st Setvizan 863 62 10ms 12 Jan 2023 821st GreenBeansAgainstVeganism 863 62 12ms 13 Jan 2023 821st arctouch-cristiannevianna 863 62 10ms 3 Apr 2023 821st Corxldyphik 863 62 10ms 11 Apr 2023 821st Blockyheadman 863 62 11ms 1 Nov 2023 First Prev 751–825 of 3,484 Next Last