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 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 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 298th sean-niemann 🇺🇸 936 89 477ms 24 Sep 2025 298th Shanethegamer 🇺🇸 936 89 415ms 25 Sep 2025 298th nwellnhof 🇩🇪 936 89 425ms 25 Sep 2025 298th m-tkach 🇺🇦 936 89 364ms 25 Sep 2025 298th namelessiw 936 89 357ms 2 Oct 2025 298th Yewzir 🇧🇪 936 89 345ms 2 Oct 2025 298th Yax42 🇫🇷 936 89 356ms 4 Oct 2025 298th stefangimmillaro 936 89 352ms 6 Oct 2025 298th CaedenHarper 🇨🇦 936 89 353ms 9 Oct 2025 298th Jacob385 936 89 365ms 10 days ago 311th nwellnhof 🇩🇪 933 42 343ms 4 May 2022 311th Lydxn 🇨🇦 933 42 1,762ms 4 May 2022 311th GrayJoKing 🇦🇺 933 42 418ms 4 May 2022 311th Steffan153 🇫🇮 933 42 357ms 16 Dec 2022 311th sisyphus-ppcg 🇦🇺 933 42 362ms 31 Jan 2023 311th ovs-code 🇩🇪 933 42 513ms 30 Dec 2023 311th sean-niemann 🇺🇸 933 42 339ms 8 Mar 2025 318th emplv 🇱🇻 933 60 9ms 5 May 2022 318th GrayJoKing 🇦🇺 933 60 9ms 6 May 2022 318th targrik 933 60 10ms 24 Dec 2024 318th xsot 🇸🇬 933 60 9ms 1 May 2025 322nd m-tkach 🇺🇦 932 91 56ms 5 May 2022 322nd 09cf 932 91 53ms 4 Oct 2023 324th GrayJoKing 🇦🇺 931 56 416ms 15 Jan 2024 324th AlephSquirrel 931 56 704ms 21 Jan 2024 326th MeWhenI 🇻🇦 931 68 88ms 23 Feb 2023 326th JayXon 🇺🇸 931 68 91ms 4 Mar 2025 328th ovs-code 🇩🇪 930 60 7ms 9 Oct 2023 328th GrayJoKing 🇦🇺 930 60 5ms 11 Oct 2023 328th Lydxn 🇨🇦 930 60 7ms 11 Oct 2023 328th GolfingSuccess 🇬🇷 930 60 5ms 16 Nov 2023 328th Steffan153 🇫🇮 930 60 5ms 28 Jan 2024 328th JayXon 🇺🇸 930 60 5ms 29 Jan 2024 328th rucin93 🇵🇱 930 60 5ms 10 Jul 2024 328th sean-niemann 🇺🇸 930 60 5ms 10 Jul 2024 336th Lydxn 🇨🇦 930 70 106ms 17 Oct 2022 336th JayXon 🇺🇸 930 70 110ms 17 Oct 2022 336th GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 336th FlyingPenguin223 930 70 4ms 4 Oct 2024 336th jipsong 🇩🇪 930 70 6ms 5 Apr 2025 341st Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 341st SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 343rd Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 343rd JayXon 🇺🇸 929 67 53ms 19 Aug 2024 345th sisyphus-ppcg 🇦🇺 928 50 2,856ms 31 Jan 2023 345th saito-ta 🇯🇵 928 50 890ms 12 Dec 2024 347th JayXon 🇺🇸 928 57 166ms 19 Aug 2024 348th roavin 927 84 338ms 23 Jun 2022 348th tkr-sh 🇰🇵 927 84 330ms 20 Aug 2022 348th Nickmiste 927 84 360ms 9 Nov 2022 348th Matgc04 927 84 396ms 19 May 2023 348th postie77 927 84 358ms 19 May 2023 348th ertz1ertz 927 84 364ms 13 Sep 2024 348th Grabnukebomb 927 84 374ms 13 Sep 2024 348th Shanethegamer 🇺🇸 927 84 342ms 9 Apr 2025 348th HumanoidCPU 927 84 370ms 10 Apr 2025 348th annaproxy 927 84 340ms 11 Apr 2025 348th Re-Adventures 🇮🇳 927 84 335ms 15 Apr 2025 348th janbehrens 🇩🇪 927 84 352ms 17 Apr 2025 348th Flix7dev 🇧🇪 927 84 410ms 16 days ago 361st scpchicken 🇵🇼 926 72 21ms 4 May 2022 361st sultan 926 72 16ms 6 Jun 2022 361st annaproxy 926 72 23ms 22 Aug 2022 361st BlankSpruce 926 72 40ms 9 Sep 2022 361st ValentinCassayre 926 72 21ms 8 Oct 2022 361st commandblockguy 🇺🇸 926 72 23ms 3 Nov 2022 361st mathb0y512 926 72 27ms 1 Dec 2022 361st NoahBolohan 🇨🇦 926 72 23ms 28 Feb 2023 361st neel11235813 926 72 22ms 8 Mar 2023 361st Kacarott 🇦🇺 926 72 17ms 24 Mar 2023 361st Fracture17 926 72 21ms 8 Apr 2023 361st ayushdewan 926 72 29ms 7 May 2023 361st PeterTillema 🇳🇱 926 72 22ms 17 Oct 2023 361st Glinte 926 72 35ms 11 Dec 2023 361st nanatsu8 926 72 26ms 11 May 2024 First Prev 301–375 of 3,428 Next Last