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 301st Steffan153 🇫🇮 917 71 107ms 14 Oct 2022 301st Shanethegamer 🇺🇸 917 71 106ms 15 Oct 2022 301st stefangimmillaro 917 71 106ms 16 Oct 2022 301st MeWhenI 🇻🇦 917 71 105ms 16 Oct 2022 301st Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 301st synt7x 🇺🇸 917 71 4ms 7 Jul 2025 307th annaproxy 917 79 128ms 24 Aug 2022 307th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 307th JayXon 🇺🇸 917 79 554ms 5 Apr 2023 307th Lydxn 🇨🇦 917 79 585ms 9 Apr 2023 307th IanUtley 917 79 119ms 3 Nov 2023 307th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 313th Steffan153 🇫🇮 917 81 26ms 11 Dec 2023 314th arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 314th tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 316th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 316th JayXon 🇺🇸 916 87 508ms 15 May 2023 316th Steffan153 🇫🇮 916 87 389ms 16 May 2023 316th Lydxn 🇨🇦 916 87 465ms 16 May 2023 316th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 316th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 322nd kmathis22 916 91 354ms 11 mins ago 323rd Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 323rd Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 325th Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 325th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 327th ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 327th Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 329th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 330th andersk 🇺🇸 914 91 120ms 25 Oct 2022 330th Super-Pizza 🇨🇦 914 91 127ms 4 Dec 2022 330th klixel 🇨🇦 914 91 121ms 20 May 2023 330th lynn 914 91 127ms 6 Jul 2024 330th edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 330th DialFrost 🇸🇬 914 91 122ms 7 Apr 2025 336th lynn 913 78 1,328ms 5 May 2022 337th tailorspy 912 93 53ms 27 May 2024 337th sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 337th KasperKivimaeki 🇫🇮 912 93 54ms 24 days ago 340th nai62 911 69 7ms 27 Aug 2022 341st GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 342nd GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 342nd MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 344th Shanethegamer 🇺🇸 910 77 12ms 15 May 2023 345th primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 345th AlephSquirrel 910 93 30ms 21 Jan 2023 345th kg583 🇺🇸 910 93 29ms 26 Dec 2024 345th CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 345th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 350th MeWhenI 🇻🇦 909 63 206ms 5 May 2022 351st Lydxn 🇨🇦 909 68 437ms 5 May 2022 351st GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 351st Bubbler-4 909 68 15ms 15 Nov 2022 351st Rubiksmath 909 68 15ms 14 Aug 2023 355th edsrzf 🇳🇿 909 72 129ms 3 Jul 2025 356th marshallward 🇺🇸 909 83 46ms 10 May 2022 357th ovs-code 🇩🇪 909 84 65ms 25 Sep 2022 357th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 357th edsrzf 🇳🇿 909 84 80ms 8 days ago 360th Betuaredead 908 60 6ms 5 Jan 2023 360th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 360th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 360th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 360th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 360th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 366th DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 367th edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 367th kg583 🇺🇸 908 83 39ms 14 Feb 2025 369th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 370th KrausRaus 🇺🇸 907 59 10ms 4 May 2022 370th voytxt 🇨🇿 907 59 10ms 4 May 2022 370th KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 370th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 370th aksyristos 907 59 10ms 28 Oct 2022 370th nstearns96 🇬🇧 907 59 10ms 28 Nov 2022 First Prev 301–375 of 3,473 Next Last