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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 Nim 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 Nim 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 199th dokutan 937 89 617ms 24 Sep 2025 199th sean-niemann 🇺🇸 937 89 443ms 24 Sep 2025 199th Shanethegamer 🇺🇸 937 89 484ms 25 Sep 2025 199th nwellnhof 🇩🇪 937 89 491ms 25 Sep 2025 199th m-tkach 🇺🇦 937 89 504ms 25 Sep 2025 199th namelessiw 937 89 531ms 2 Oct 2025 199th Yewzir 🇧🇪 937 89 502ms 2 Oct 2025 199th Yax42 🇫🇷 937 89 458ms 4 Oct 2025 199th stefangimmillaro 937 89 529ms 6 Oct 2025 199th CaedenHarper 🇨🇦 937 89 482ms 9 Oct 2025 199th Jacob385 937 89 491ms 27 Oct 2025 199th MeWhenI 🇻🇦 937 89 536ms 7 Nov 2025 199th ethanlally 937 89 507ms 10 Nov 2025 199th snoozingnewt 🇨🇦 937 89 448ms 23 Nov 2025 199th ScottHamper 937 89 441ms 30 Nov 2025 199th KasperKivimaeki 🇫🇮 937 89 462ms 30 Nov 2025 217th JayXon 🇺🇸 936 73 4ms 23 Dec 2025 218th vang1ong7ang 935 89 132ms 19 days ago 219th nwellnhof 🇩🇪 934 42 394ms 4 May 2022 219th Lydxn 🇨🇦 934 42 1,604ms 4 May 2022 219th GrayJoKing 🇦🇺 934 42 387ms 4 May 2022 219th Steffan153 🇫🇮 934 42 426ms 16 Dec 2022 219th sisyphus-ppcg 🇦🇺 934 42 382ms 31 Jan 2023 219th ovs-code 🇩🇪 934 42 428ms 30 Dec 2023 219th sean-niemann 🇺🇸 934 42 361ms 8 Mar 2025 226th emplv 🇱🇻 934 60 9ms 5 May 2022 226th GrayJoKing 🇦🇺 934 60 11ms 6 May 2022 226th targrik 934 60 10ms 24 Dec 2024 226th xsot 🇸🇬 934 60 10ms 1 May 2025 230th m-tkach 🇺🇦 934 91 61ms 5 May 2022 230th 09cf 934 91 61ms 4 Oct 2023 230th Herbert00709 🇵🇱 934 91 67ms 7 days ago 233rd Steffan153 🇫🇮 932 51 977ms 19 Mar 2026 234th GrayJoKing 🇦🇺 932 56 470ms 15 Jan 2024 234th AlephSquirrel 932 56 419ms 21 Jan 2024 234th CaedenHarper 🇨🇦 932 56 379ms 26 Jan 2026 237th ovs-code 🇩🇪 932 60 5ms 9 Oct 2023 237th GrayJoKing 🇦🇺 932 60 4ms 11 Oct 2023 237th Lydxn 🇨🇦 932 60 5ms 11 Oct 2023 237th GolfingSuccess 🇬🇷 932 60 4ms 16 Nov 2023 237th Steffan153 🇫🇮 932 60 5ms 28 Jan 2024 237th JayXon 🇺🇸 932 60 4ms 29 Jan 2024 237th rucin93 🇵🇱 932 60 5ms 10 Jul 2024 237th sean-niemann 🇺🇸 932 60 5ms 10 Jul 2024 237th edsrzf 🇳🇿 932 60 5ms 9 Mar 2026 246th MeWhenI 🇻🇦 932 68 99ms 23 Feb 2023 246th JayXon 🇺🇸 932 68 101ms 4 Mar 2025 248th Lydxn 🇨🇦 931 70 109ms 17 Oct 2022 248th JayXon 🇺🇸 931 70 108ms 17 Oct 2022 250th Natanaelel 🇸🇪 929 28 177ms 22 Jul 2022 250th SirBogman 🇺🇸 929 28 182ms 17 Sep 2022 252nd sisyphus-ppcg 🇦🇺 929 50 2,565ms 31 Jan 2023 252nd saito-ta 🇯🇵 929 50 844ms 12 Dec 2024 254th JayXon 🇺🇸 929 57 155ms 19 Aug 2024 255th sisyphus-ppcg 🇦🇺 929 65 119ms 19 Dec 2025 255th ovs-code 🇩🇪 929 65 145ms 19 Dec 2025 257th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 257th JayXon 🇺🇸 929 67 37ms 19 Aug 2024 259th roavin 928 84 427ms 23 Jun 2022 259th tkr-sh 🇰🇵 928 84 457ms 20 Aug 2022 259th Nickmiste 928 84 443ms 9 Nov 2022 259th Matgc04 928 84 497ms 19 May 2023 259th postie77 928 84 410ms 19 May 2023 259th ertz1ertz 928 84 419ms 13 Sep 2024 259th Grabnukebomb 928 84 387ms 13 Sep 2024 259th Shanethegamer 🇺🇸 928 84 443ms 9 Apr 2025 259th HumanoidCPU 928 84 414ms 10 Apr 2025 259th annaproxy 928 84 443ms 11 Apr 2025 259th Re-Adventures 🇮🇳 928 84 401ms 15 Apr 2025 259th janbehrens 🇩🇪 928 84 404ms 17 Apr 2025 259th Flix7dev 🇧🇪 928 84 403ms 21 Oct 2025 272nd h3ra993huskp 🇯🇵 927 90 592ms 30 Nov 2025 273rd KasperKivimaeki 🇫🇮 927 104 358ms 10 Dec 2025 274th btnlq 925 59 5ms 6 Nov 2022 274th DialFrost 🇸🇬 925 59 5ms 23 Dec 2025 276th Lydxn 🇨🇦 925 90 123ms 6 May 2022 277th Bubbler-4 924 33 2,528ms 6 May 2022 277th rak1507 🇬🇧 924 33 108ms 8 May 2022 277th ngn 🇧🇬 924 33 25ms 11 May 2022 277th zacjl 924 33 32ms 3 Jun 2025 277th GrayJoKing 🇦🇺 924 33 13ms 4 Jun 2025 277th HPWiz 🇳🇿 924 33 9ms 16 Nov 2025 283rd nwellnhof 🇩🇪 924 51 39ms 4 May 2022 283rd primo-ppcg 🇹🇭 924 51 41ms 6 May 2022 283rd janlelis 924 51 40ms 10 May 2022 283rd Natanaelel 🇸🇪 924 51 42ms 2 Jun 2022 283rd blaztoma 🇱🇹 924 51 40ms 11 Mar 2026 288th MichalMarsalek 🇨🇿 924 71 138ms 5 May 2022 288th Lydxn 🇨🇦 924 71 140ms 7 May 2022 288th GrayJoKing 🇦🇺 924 71 131ms 8 May 2022 288th JayXon 🇺🇸 924 71 142ms 8 May 2022 288th Steffan153 🇫🇮 924 71 135ms 9 Mar 2023 288th Shanethegamer 🇺🇸 924 71 132ms 15 May 2023 288th MeWhenI 🇻🇦 924 71 137ms 8 Aug 2023 288th sean-niemann 🇺🇸 924 71 148ms 9 Jan 2025 296th 4QT0R 924 92 61ms 23 Nov 2023 296th ovs-code 🇩🇪 924 92 63ms 3 Jun 2024 298th uiamn 923 58 12ms 6 Sep 2022 298th 5quiwyrm 923 58 11ms 29 Sep 2022 298th alasdair-greenland 923 58 13ms 13 Jan 2023 First Prev 201–300 of 3,779 Next Last