Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 651st commandz0 🇺🇸 884 70 20ms 16 Nov 2025 651st hellopir2 884 70 20ms 23 Nov 2025 651st bzijlema 🇳🇱 884 70 21ms 3 Dec 2025 651st blaztoma 🇱🇹 884 70 23ms 16 Feb 2026 651st firegene 🇮🇪 884 70 20ms 25 Feb 2026 651st Googolplexo 🇷🇺 884 70 19ms 25 Mar 2026 651st edsrzf 🇳🇿 884 70 23ms 19 days ago 651st Mikey-Beep 🇬🇧 884 70 31ms 17 days ago 729th GrayJoKing 🇦🇺 884 84 35ms 19 Jun 2022 729th primo-ppcg 🇹🇭 884 84 36ms 29 Jun 2022 729th MeWhenI 🇻🇦 884 84 38ms 30 Dec 2025 732nd primo-ppcg 🇹🇭 884 193 107ms 14 Aug 2025 733rd Shanethegamer 🇺🇸 883 51 474ms 15 May 2023 734th GrayJoKing 🇦🇺 883 60 144ms 24 Oct 2024 735th Shanethegamer 🇺🇸 883 73 145ms 8 May 2025 735th DialFrost 🇸🇬 883 73 149ms 3 Jun 2025 735th edsrzf 🇳🇿 883 73 144ms 4 Jul 2025 738th Shanethegamer 🇺🇸 883 142 1,207ms 27 Mar 2025 738th DialFrost 🇸🇬 883 142 1,201ms 28 Mar 2025 738th emgordon154 883 142 1,229ms 10 Apr 2025 738th GolfingSuccess 🇬🇷 883 142 1,214ms 6 Dec 2025 742nd CaedenHarper 🇨🇦 881 54 1,394ms 27 Sep 2025 742nd sean-niemann 🇺🇸 881 54 1,439ms 27 Sep 2025 742nd albanian-laundromat 🇺🇸 881 54 1,376ms 14 Nov 2025 742nd xsot 🇸🇬 881 54 1,064ms 15 Nov 2025 746th kg583 🇺🇸 881 105 11ms 14 Mar 2026 746th Steffan153 🇫🇮 881 105 12ms 19 Mar 2026 748th dokutan 880 62 5ms 28 Apr 2025 749th johnnythedoggie 880 72 102ms 13 May 2022 749th kaascevich 880 72 104ms 8 Jul 2025 749th madeforlosers 880 72 97ms 17 Mar 2026 752nd Shanethegamer 🇺🇸 879 66 172ms 4 May 2022 752nd scpchicken 🇵🇼 879 66 254ms 5 May 2022 752nd sisyphus-ppcg 🇦🇺 879 66 173ms 6 May 2022 752nd Natanaelel 🇸🇪 879 66 144ms 15 Jun 2022 752nd Z-snails 879 66 254ms 27 Feb 2023 752nd Jeremy-Stafford 879 66 258ms 27 Feb 2023 752nd alomiF 879 66 287ms 1 Sep 2023 752nd btnlq 879 66 145ms 17 Oct 2023 752nd Shengxuan-Zhang 879 66 278ms 20 Feb 2026 761st DialFrost 🇸🇬 879 86 40ms 24 Oct 2024 761st stefangimmillaro 879 86 39ms 14 Jan 2025 763rd c0d3-4-F00d 🇩🇪 878 61 12ms 6 May 2022 763rd jackkav 878 61 11ms 26 Jun 2022 763rd TechNolaByte 878 61 12ms 6 Jul 2022 763rd Heathcorp 🇦🇺 878 61 12ms 17 Jul 2022 763rd C0de5mith 🇺🇸 878 61 13ms 3 Aug 2022 763rd sebipopa 🇷🇴 878 61 11ms 18 Aug 2022 763rd moikaturns 🇬🇧 878 61 13ms 25 Sep 2022 763rd FlorianCassayre 🇫🇷 878 61 12ms 27 Sep 2022 763rd Mazn3k 878 61 13ms 1 Feb 2023 763rd tvcv901 878 61 12ms 22 Mar 2023 763rd unfinishedprogram 878 61 12ms 19 Jul 2023 763rd snoozingnewt 🇨🇦 878 61 11ms 23 Sep 2023 763rd funnyboy-roks 878 61 12ms 9 May 2024 763rd bac0id 878 61 15ms 29 Jun 2024 763rd FortuiteMan 🇫🇷 878 61 12ms 10 Oct 2024 763rd RobertHoeh 878 61 13ms 5 Apr 2025 763rd LvLError 878 61 11ms 29 May 2025 763rd miles-evan 878 61 22ms 5 Aug 2025 763rd alexsave 878 61 11ms 13 Oct 2025 763rd ComradeSquirrel 878 61 11ms 19 days ago 783rd madeforlosers 878 95 450ms 15 days ago 784th nwellnhof 🇩🇪 877 53 6ms 4 May 2022 784th GrayJoKing 🇦🇺 877 53 7ms 6 May 2022 786th AlephSquirrel 876 80 12ms 20 Apr 2023 786th ashtraypettingzoo 🇺🇸 876 80 14ms 1 Apr 2024 788th c0d3-4-F00d 🇩🇪 876 89 407ms 5 May 2022 788th fkantelberg 876 89 467ms 15 Jul 2023 788th TRexOnGit 876 89 387ms 16 Feb 2024 791st inventshah 876 97 58ms 6 May 2022 791st emgordon154 876 97 60ms 8 Feb 2026 793rd Shanethegamer 🇺🇸 876 98 110ms 15 Apr 2025 793rd GolfingSuccess 🇬🇷 876 98 102ms 28 Nov 2025 793rd DialFrost 🇸🇬 876 98 109ms 1 Dec 2025 796th MeWhenI 🇻🇦 876 110 346ms 9 Feb 2023 796th targrik 876 110 340ms 30 Jun 2025 798th DialFrost 🇸🇬 875 69 99ms 15 Jul 2024 799th Steffan153 🇫🇮 875 83 465ms 9 Apr 2023 799th ovs-code 🇩🇪 875 83 57ms 1 Jul 2024 First Prev 721–800 of 3,778 Next Last