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 219th sean-niemann 🇺🇸 930 60 5ms 10 Jul 2024 227th Lydxn 🇨🇦 930 70 116ms 17 Oct 2022 227th JayXon 🇺🇸 930 70 109ms 17 Oct 2022 227th GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 227th FlyingPenguin223 930 70 4ms 4 Oct 2024 227th jipsong 🇩🇪 930 70 6ms 5 Apr 2025 232nd Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 232nd SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 234th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 234th JayXon 🇺🇸 929 67 53ms 19 Aug 2024 236th sisyphus-ppcg 🇦🇺 928 50 2,856ms 31 Jan 2023 236th saito-ta 🇯🇵 928 50 890ms 12 Dec 2024 238th JayXon 🇺🇸 928 57 136ms 19 Aug 2024 239th roavin 927 84 316ms 23 Jun 2022 239th tkr-sh 🇰🇵 927 84 313ms 20 Aug 2022 239th Nickmiste 927 84 321ms 9 Nov 2022 239th Matgc04 927 84 319ms 19 May 2023 239th postie77 927 84 319ms 19 May 2023 239th ertz1ertz 927 84 317ms 13 Sep 2024 239th Grabnukebomb 927 84 314ms 13 Sep 2024 239th Shanethegamer 🇺🇸 927 84 341ms 9 Apr 2025 239th HumanoidCPU 927 84 344ms 10 Apr 2025 239th annaproxy 927 84 332ms 11 Apr 2025 239th Re-Adventures 🇮🇳 927 84 324ms 15 Apr 2025 239th janbehrens 🇩🇪 927 84 349ms 17 Apr 2025 239th Flix7dev 🇧🇪 927 84 341ms 21 Oct 2025 252nd JayXon 🇺🇸 926 105 248ms 4 Oct 2025 252nd KasperKivimaeki 🇫🇮 926 105 243ms 4 Oct 2025 254th edsrzf 🇳🇿 925 54 796ms 13 Sep 2025 254th CaedenHarper 🇨🇦 925 54 817ms 27 Sep 2025 254th sean-niemann 🇺🇸 925 54 818ms 27 Sep 2025 254th albanian-laundromat 925 54 859ms 9 days ago 254th xsot 🇸🇬 925 54 811ms 8 days ago 259th ovs-code 🇩🇪 925 67 92ms 13 Dec 2022 259th Steffan153 🇫🇮 925 67 99ms 18 Dec 2022 259th Lydxn 🇨🇦 925 67 105ms 4 Feb 2023 259th sean-niemann 🇺🇸 925 67 107ms 7 Mar 2025 263rd Lydxn 🇨🇦 924 90 124ms 6 May 2022 264th Bubbler-4 923 33 2,611ms 6 May 2022 264th rak1507 🇬🇧 923 33 112ms 8 May 2022 264th ngn 🇧🇬 923 33 25ms 11 May 2022 264th zacjl 923 33 33ms 3 Jun 2025 264th GrayJoKing 🇦🇺 923 33 15ms 4 Jun 2025 264th HPWiz 🇳🇿 923 33 9ms 7 days ago 270th uiamn 923 58 11ms 6 Sep 2022 270th 5quiwyrm 923 58 10ms 29 Sep 2022 270th alasdair-greenland 923 58 12ms 13 Jan 2023 270th kirjavascript 923 58 10ms 4 Aug 2025 270th Posandu 923 58 11ms 26 Aug 2025 270th mrxz 🇳🇱 923 58 13ms 3 Sep 2025 276th btnlq 923 59 8ms 6 Nov 2022 277th nwellnhof 🇩🇪 922 51 50ms 4 May 2022 277th primo-ppcg 🇹🇭 922 51 43ms 6 May 2022 277th janlelis 922 51 39ms 10 May 2022 277th Natanaelel 🇸🇪 922 51 39ms 2 Jun 2022 281st MichalMarsalek 🇨🇿 922 71 122ms 5 May 2022 281st Lydxn 🇨🇦 922 71 126ms 7 May 2022 281st GrayJoKing 🇦🇺 922 71 128ms 8 May 2022 281st JayXon 🇺🇸 922 71 137ms 8 May 2022 281st Steffan153 🇫🇮 922 71 120ms 9 Mar 2023 281st Shanethegamer 🇺🇸 922 71 128ms 15 May 2023 281st MeWhenI 🇻🇦 922 71 121ms 8 Aug 2023 281st sean-niemann 🇺🇸 922 71 126ms 9 Jan 2025 289th Steffan153 🇫🇮 922 76 11ms 15 May 2023 289th primo-ppcg 🇹🇭 922 76 18ms 15 May 2023 289th Lydxn 🇨🇦 922 76 8ms 22 May 2023 289th GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 293rd Herbert00709 🇵🇱 922 92 57ms 17 Nov 2023 293rd 4QT0R 922 92 55ms 23 Nov 2023 293rd ovs-code 🇩🇪 922 92 58ms 3 Jun 2024 296th xnor-gate 920 63 194ms 20 Jan 2025 297th pardouin 🇫🇷 919 72 3,105ms 21 May 2025 298th Lydxn 🇨🇦 918 70 96ms 7 May 2022 298th JayXon 🇺🇸 918 70 96ms 7 May 2022 300th JayXon 🇺🇸 918 79 554ms 5 Apr 2023 First Prev 226–300 of 3,484 Next Last