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 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 Bytes Time Submitted 294th namelessiw 936 89 400ms 20 days ago 294th Yewzir 🇧🇪 936 89 501ms 20 days ago 294th Yax42 🇫🇷 936 89 429ms 18 days ago 294th stefangimmillaro 936 89 445ms 16 days ago 294th CaedenHarper 🇨🇦 936 89 421ms 13 days ago 306th nwellnhof 🇩🇪 933 42 343ms 4 May 2022 306th Lydxn 🇨🇦 933 42 1,762ms 4 May 2022 306th GrayJoKing 🇦🇺 933 42 418ms 4 May 2022 306th Steffan153 🇫🇮 933 42 357ms 16 Dec 2022 306th sisyphus-ppcg 🇦🇺 933 42 362ms 31 Jan 2023 306th ovs-code 🇩🇪 933 42 513ms 30 Dec 2023 306th sean-niemann 🇺🇸 933 42 339ms 8 Mar 2025 313th emplv 🇱🇻 933 60 13ms 5 May 2022 313th GrayJoKing 🇦🇺 933 60 11ms 6 May 2022 313th targrik 933 60 9ms 24 Dec 2024 313th xsot 🇸🇬 933 60 12ms 1 May 2025 317th GrayJoKing 🇦🇺 931 56 416ms 15 Jan 2024 317th AlephSquirrel 931 56 704ms 21 Jan 2024 319th MeWhenI 🇻🇦 931 68 105ms 23 Feb 2023 319th JayXon 🇺🇸 931 68 104ms 4 Mar 2025 321st m-tkach 🇺🇦 931 91 63ms 5 May 2022 321st 09cf 931 91 63ms 4 Oct 2023 323rd ovs-code 🇩🇪 930 60 7ms 9 Oct 2023 323rd GrayJoKing 🇦🇺 930 60 5ms 11 Oct 2023 323rd Lydxn 🇨🇦 930 60 7ms 11 Oct 2023 323rd GolfingSuccess 🇬🇷 930 60 5ms 16 Nov 2023 323rd Steffan153 🇫🇮 930 60 5ms 28 Jan 2024 323rd JayXon 🇺🇸 930 60 5ms 29 Jan 2024 323rd rucin93 🇵🇱 930 60 5ms 10 Jul 2024 323rd sean-niemann 🇺🇸 930 60 5ms 10 Jul 2024 331st Lydxn 🇨🇦 930 70 106ms 17 Oct 2022 331st JayXon 🇺🇸 930 70 110ms 17 Oct 2022 331st GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 331st FlyingPenguin223 930 70 4ms 4 Oct 2024 331st jipsong 🇩🇪 930 70 6ms 5 Apr 2025 336th Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 336th SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 338th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 338th JayXon 🇺🇸 929 67 53ms 19 Aug 2024 340th sisyphus-ppcg 🇦🇺 928 50 2,856ms 31 Jan 2023 340th saito-ta 🇯🇵 928 50 890ms 12 Dec 2024 342nd JayXon 🇺🇸 928 57 145ms 19 Aug 2024 343rd roavin 927 84 338ms 23 Jun 2022 343rd tkr-sh 🇫🇷 927 84 330ms 20 Aug 2022 343rd Nickmiste 927 84 360ms 9 Nov 2022 343rd Matgc04 927 84 396ms 19 May 2023 343rd postie77 927 84 358ms 19 May 2023 343rd ertz1ertz 927 84 364ms 13 Sep 2024 343rd Grabnukebomb 927 84 374ms 13 Sep 2024 343rd Shanethegamer 🇺🇸 927 84 342ms 9 Apr 2025 343rd HumanoidCPU 927 84 370ms 10 Apr 2025 343rd annaproxy 927 84 340ms 11 Apr 2025 343rd Re-Adventures 🇮🇳 927 84 335ms 15 Apr 2025 343rd janbehrens 🇩🇪 927 84 352ms 17 Apr 2025 343rd Flix7dev 🇧🇪 927 84 410ms 26 hours ago 356th scpchicken 🇵🇼 926 72 21ms 4 May 2022 356th sultan 926 72 16ms 6 Jun 2022 356th annaproxy 926 72 23ms 22 Aug 2022 356th BlankSpruce 926 72 40ms 9 Sep 2022 356th ValentinCassayre 926 72 21ms 8 Oct 2022 356th commandblockguy 🇺🇸 926 72 23ms 3 Nov 2022 356th mathb0y512 926 72 27ms 1 Dec 2022 356th NoahBolohan 🇨🇦 926 72 23ms 28 Feb 2023 356th neel11235813 926 72 22ms 8 Mar 2023 356th Kacarott 🇦🇺 926 72 17ms 24 Mar 2023 356th Fracture17 926 72 21ms 8 Apr 2023 356th ayushdewan 926 72 29ms 7 May 2023 356th PeterTillema 🇳🇱 926 72 22ms 17 Oct 2023 356th Glinte 926 72 35ms 11 Dec 2023 356th nanatsu8 926 72 26ms 11 May 2024 356th thej10n 926 72 23ms 12 Jun 2024 356th duckyluuk 🇳🇱 926 72 21ms 13 Jun 2024 356th tobeannouncd 926 72 22ms 25 Apr 2025 356th YAJUE114514 926 72 17ms 15 Aug 2025 356th blaztoma 🇱🇹 926 72 39ms 26 days ago First Prev 301–375 of 3,408 Next Last