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 299th stefangimmillaro 917 71 106ms 16 Oct 2022 299th MeWhenI 🇻🇦 917 71 105ms 16 Oct 2022 299th Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 299th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 305th annaproxy 917 79 128ms 24 Aug 2022 305th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 305th JayXon 🇺🇸 917 79 869ms 5 Apr 2023 305th Lydxn 🇨🇦 917 79 858ms 9 Apr 2023 305th IanUtley 917 79 119ms 3 Nov 2023 305th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 311th Steffan153 🇫🇮 917 81 26ms 11 Dec 2023 312th arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 312th tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 314th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 314th JayXon 🇺🇸 916 87 508ms 15 May 2023 314th Steffan153 🇫🇮 916 87 389ms 16 May 2023 314th Lydxn 🇨🇦 916 87 465ms 16 May 2023 314th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 314th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 320th Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 320th Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 322nd Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 322nd edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 324th ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 324th Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 326th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 327th lynn 913 78 1,358ms 5 May 2022 328th andersk 🇺🇸 913 91 120ms 25 Oct 2022 328th Super-Pizza 🇨🇦 913 91 127ms 4 Dec 2022 328th klixel 🇨🇦 913 91 121ms 20 May 2023 328th lynn 913 91 140ms 6 Jul 2024 328th edsrzf 🇳🇿 913 91 124ms 29 Nov 2024 328th DialFrost 🇸🇬 913 91 123ms 7 Apr 2025 334th tailorspy 912 93 53ms 27 May 2024 334th sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 334th KasperKivimaeki 🇫🇮 912 93 54ms 20 days ago 337th nai62 911 69 7ms 27 Aug 2022 338th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 339th GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 339th MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 341st Shanethegamer 🇺🇸 910 77 15ms 15 May 2023 342nd primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 342nd AlephSquirrel 910 93 30ms 21 Jan 2023 342nd kg583 🇺🇸 910 93 29ms 26 Dec 2024 342nd CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 342nd edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 347th MeWhenI 🇻🇦 909 63 238ms 5 May 2022 348th Lydxn 🇨🇦 909 68 420ms 5 May 2022 348th GrayJoKing 🇦🇺 909 68 14ms 15 Nov 2022 348th Bubbler-4 909 68 15ms 15 Nov 2022 348th JayXon 🇺🇸 909 68 14ms 7 Mar 2023 348th Rubiksmath 909 68 15ms 14 Aug 2023 353rd edsrzf 🇳🇿 909 72 129ms 3 Jul 2025 354th marshallward 🇺🇸 909 83 46ms 10 May 2022 355th ovs-code 🇩🇪 909 84 66ms 25 Sep 2022 355th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 355th edsrzf 🇳🇿 909 84 80ms 3 days ago 358th Betuaredead 908 60 6ms 5 Jan 2023 358th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 358th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 358th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 358th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 358th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 364th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 365th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 366th KrausRaus 🇺🇸 907 59 13ms 4 May 2022 366th voytxt 🇨🇿 907 59 10ms 4 May 2022 366th KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 366th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 366th aksyristos 907 59 10ms 28 Oct 2022 366th nstearns96 🇬🇧 907 59 10ms 28 Nov 2022 366th janbehrens 🇩🇪 907 59 10ms 17 May 2023 366th Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 366th Maznek 907 59 10ms 26 Jun 2023 366th SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 First Prev 301–375 of 3,465 Next Last