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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 376th marshallward 🇺🇸 903 83 46ms 10 May 2022 377th primo-ppcg 🇹🇭 903 93 42ms 7 May 2022 377th AlephSquirrel 903 93 30ms 21 Jan 2023 377th kg583 🇺🇸 903 93 32ms 26 Dec 2024 377th CLOStrophobic 🇮🇹 903 93 31ms 17 Jan 2025 377th edsrzf 🇳🇿 903 93 35ms 3 Jul 2025 382nd Shanethegamer 🇺🇸 902 77 13ms 15 May 2023 383rd krcs 🇵🇱 902 86 325ms 10 May 2022 383rd billings7 🇬🇧 902 86 411ms 15 May 2022 383rd revlayle 🇺🇸 902 86 353ms 7 Dec 2022 383rd albanian-laundromat 902 86 319ms 22 days ago 387th m-tkach 🇺🇦 902 90 31ms 7 Dec 2023 388th shellbertt 🇨🇦 901 62 20ms 4 May 2022 388th ZakkkkAttackkkk 🇵🇭 901 62 20ms 5 May 2022 388th annaproxy 901 62 21ms 8 Jun 2022 388th bob-th 901 62 27ms 9 Jul 2022 388th btjones0 901 62 25ms 15 Jul 2022 388th tri1212 🇻🇳 901 62 20ms 18 Jul 2022 388th fredrik-bakke 🇳🇴 901 62 24ms 5 Oct 2022 388th jakobkordez 🇸🇮 901 62 27ms 19 Oct 2022 388th Fishron 901 62 27ms 29 Nov 2022 388th KatieLG 🇬🇧 901 62 11 Dec 2022 388th ItsMeNoobieboy 901 62 20ms 20 Dec 2022 388th firegene 🇮🇪 901 62 21ms 3 Jan 2023 388th ljweel 901 62 18ms 13 Feb 2023 388th 2011-Chan-Ethan 901 62 20ms 9 Jul 2023 388th elgan65536 901 62 21ms 18 Nov 2023 388th Dataen 901 62 20ms 16 Jan 2024 388th Yewzir 🇧🇪 901 62 51ms 5 Apr 2024 388th cuboids 901 62 24ms 11 Jul 2024 388th wuzekai518 901 62 33ms 26 Jul 2024 388th abhishekg999 901 62 57ms 17 Sep 2024 388th lifthrasiir 🇰🇷 901 62 19ms 16 Nov 2024 388th Artemis21 🇬🇧 901 62 20ms 17 Jan 2025 388th lolgeny 901 62 25ms 22 Feb 2025 388th keelimeguy 🇺🇸 901 62 20ms 15 May 2025 388th Flekay 🇩🇪 901 62 25ms 19 Jun 2025 388th DoubleUynn 901 62 19ms 25 Jun 2025 414th GolfingSuccess 🇬🇷 901 64 91ms 14 Dec 2024 414th MeWhenI 🇻🇦 901 64 83ms 24 Dec 2024 416th edsrzf 🇳🇿 901 72 150ms 3 Jul 2025 417th Betuaredead 900 60 6ms 5 Jan 2023 417th Yewzir 🇧🇪 900 60 5ms 12 Feb 2023 417th Steffan153 🇫🇮 900 60 5ms 23 Feb 2023 417th DialFrost 🇸🇬 900 60 5ms 30 Jul 2024 417th GolfingSuccess 🇬🇷 900 60 5ms 16 Oct 2024 417th sean-niemann 🇺🇸 900 60 12ms 7 Mar 2025 423rd Lydxn 🇨🇦 900 64 199ms 1 Apr 2023 424th DialFrost 🇸🇬 900 76 198ms 3 Aug 2025 425th Kacarott 🇦🇺 900 79 135ms 13 Jun 2024 425th kg583 🇺🇸 900 79 21ms 30 Jul 2025 427th stefangimmillaro 900 92 123ms 24 Oct 2023 427th inverseLorentz 🇦🇺 900 92 167ms 27 May 2024 427th sean-niemann 🇺🇸 900 92 131ms 8 Jun 2025 430th MeWhenI 🇻🇦 899 63 256ms 5 May 2022 431st Shanethegamer 🇺🇸 899 72 4ms 4 May 2022 431st jared-hughes 899 72 4ms 4 May 2022 431st Waffle3z 899 72 7ms 5 May 2022 431st Blendi-Goose 899 72 6ms 16 Mar 2025 431st edsrzf 🇳🇿 899 72 5ms 12 Apr 2025 431st sean-niemann 🇺🇸 899 72 5 days ago 437th michael-pruglo 🇺🇦 899 94 61ms 5 Jul 2022 437th zygoloid 899 94 66ms 5 Aug 2024 439th shinh 898 52 42ms 29 Jun 2022 439th MeWhenI 🇻🇦 898 52 84ms 25 Jul 2023 441st Lydxn 🇨🇦 898 70 105ms 7 May 2022 442nd MeWhenI 🇻🇦 898 71 102ms 20 Aug 2024 443rd m-tkach 🇺🇦 898 72 137ms 16 Oct 2022 443rd GrayJoKing 🇦🇺 898 72 115ms 22 Oct 2022 443rd emplv 🇱🇻 898 72 125ms 27 Oct 2022 443rd sean-niemann 🇺🇸 898 72 112ms 7 Mar 2025 447th Steffan153 🇫🇮 897 82 1 Apr 2023 447th sean-niemann 🇺🇸 897 82 12 Jul 2024 449th edsrzf 🇳🇿 897 83 42ms 14 Jan 2025 449th kg583 🇺🇸 897 83 44ms 14 Feb 2025 First Prev 376–450 of 3,385 Next Last