Collatz in all languages in chars. 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 Chars Time Submitted 371st nstearns96 🇬🇧 903 59 10ms 28 Nov 2022 371st janbehrens 🇩🇪 903 59 10ms 17 May 2023 371st Shanethegamer 🇺🇸 903 59 11ms 25 May 2023 371st Maznek 903 59 10ms 26 Jun 2023 371st SpiritAxolotl 🇺🇸 903 59 10ms 20 Mar 2024 371st Andrey-Plotnikov 903 59 10ms 19 May 2024 371st emgordon154 903 59 10ms 5 Aug 2024 371st duckyluuk 🇳🇱 903 59 11ms 3 Oct 2024 371st lifthrasiir 🇰🇷 903 59 13ms 23 Nov 2024 371st fuzzylojik-golf 🇺🇸 903 59 10ms 1 Jun 2025 371st acollett89 903 59 11ms 17 Jun 2025 371st iczelia 🇩🇪 903 59 14ms 23 Sep 2025 388th GrayJoKing 🇦🇺 903 71 289ms 10 Aug 2023 389th Shanethegamer 🇺🇸 903 77 13ms 15 May 2023 390th marshallward 🇺🇸 903 83 46ms 10 May 2022 391st edsrzf 🇳🇿 902 72 129ms 3 Jul 2025 392nd krcs 🇵🇱 902 86 325ms 10 May 2022 392nd billings7 🇬🇧 902 86 411ms 15 May 2022 392nd revlayle 🇺🇸 902 86 353ms 7 Dec 2022 392nd albanian-laundromat 902 86 319ms 30 Sep 2025 396th m-tkach 🇺🇦 902 90 31ms 7 Dec 2023 397th Betuaredead 901 60 6ms 5 Jan 2023 397th Yewzir 🇧🇪 901 60 5ms 12 Feb 2023 397th Steffan153 🇫🇮 901 60 5ms 23 Feb 2023 397th DialFrost 🇸🇬 901 60 5ms 30 Jul 2024 397th GolfingSuccess 🇬🇷 901 60 5ms 16 Oct 2024 397th sean-niemann 🇺🇸 901 60 12ms 7 Mar 2025 403rd shellbertt 🇨🇦 901 62 20ms 4 May 2022 403rd ZakkkkAttackkkk 🇵🇭 901 62 20ms 5 May 2022 403rd annaproxy 901 62 21ms 8 Jun 2022 403rd bob-th 901 62 27ms 9 Jul 2022 403rd btjones0 901 62 25ms 15 Jul 2022 403rd tri1212 🇻🇳 901 62 20ms 18 Jul 2022 403rd fredrik-bakke 🇳🇴 901 62 24ms 5 Oct 2022 403rd jakobkordez 🇸🇮 901 62 27ms 19 Oct 2022 403rd Fishron 901 62 27ms 29 Nov 2022 403rd KatieLG 🇬🇧 901 62 25ms 11 Dec 2022 403rd ItsMeNoobieboy 901 62 20ms 20 Dec 2022 403rd firegene 🇮🇪 901 62 21ms 3 Jan 2023 403rd ljweel 901 62 18ms 13 Feb 2023 403rd 2011-Chan-Ethan 901 62 20ms 9 Jul 2023 403rd elgan65536 901 62 21ms 18 Nov 2023 403rd Dataen 901 62 20ms 16 Jan 2024 403rd Yewzir 🇧🇪 901 62 51ms 5 Apr 2024 403rd cuboids 901 62 24ms 11 Jul 2024 403rd wuzekai518 901 62 33ms 26 Jul 2024 403rd abhishekg999 901 62 57ms 17 Sep 2024 403rd lifthrasiir 🇰🇷 901 62 19ms 16 Nov 2024 403rd Artemis21 🇬🇧 901 62 20ms 17 Jan 2025 403rd lolgeny 901 62 25ms 22 Feb 2025 403rd keelimeguy 🇺🇸 901 62 20ms 15 May 2025 403rd Flekay 🇩🇪 901 62 25ms 19 Jun 2025 403rd DoubleUynn 901 62 19ms 25 Jun 2025 429th GolfingSuccess 🇬🇷 901 64 86ms 14 Dec 2024 429th MeWhenI 🇻🇦 901 64 92ms 24 Dec 2024 431st kg583 🇺🇸 901 79 21ms 30 Jul 2025 432nd Lydxn 🇨🇦 900 64 199ms 1 Apr 2023 433rd DialFrost 🇸🇬 900 76 198ms 3 Aug 2025 434th Kacarott 🇦🇺 900 79 135ms 13 Jun 2024 435th edsrzf 🇳🇿 900 83 41ms 14 Jan 2025 435th kg583 🇺🇸 900 83 39ms 14 Feb 2025 437th stefangimmillaro 900 92 131ms 24 Oct 2023 437th inverseLorentz 🇦🇺 900 92 126ms 27 May 2024 437th sean-niemann 🇺🇸 900 92 124ms 8 Jun 2025 440th MeWhenI 🇻🇦 899 63 238ms 5 May 2022 441st Shanethegamer 🇺🇸 899 72 4ms 4 May 2022 441st jared-hughes 899 72 4ms 4 May 2022 441st Waffle3z 899 72 7ms 5 May 2022 441st Blendi-Goose 899 72 6ms 16 Mar 2025 441st edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 441st sean-niemann 🇺🇸 899 72 6ms 16 Oct 2025 447th michael-pruglo 🇺🇦 899 94 54ms 5 Jul 2022 447th zygoloid 899 94 54ms 5 Aug 2024 449th shinh 898 52 42ms 29 Jun 2022 449th MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 First Prev 376–450 of 3,436 Next Last