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 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 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 878th michelebastione 🇮🇹 866 90 420ms 24 Aug 2025 878th razvandmtr 🇷🇴 866 90 527ms 6 Nov 2025 883rd Andriamanitra 🇫🇮 865 67 144ms 26 Apr 2023 884th dokutan 865 79 10ms 27 Apr 2024 884th SwordF-Official 🇺🇸 865 79 10ms 1 Feb 2026 886th MeWhenI 🇻🇦 865 81 8ms 23 May 2023 887th DialFrost 🇸🇬 865 84 17ms 1 Jan 2026 888th MeWhenI 🇻🇦 865 145 1,217ms 28 Mar 2025 889th 386asm 🇺🇸 864 86 40ms 9 Apr 2023 889th DialFrost 🇸🇬 864 86 43ms 30 Dec 2025 891st HPWiz 🇳🇿 863 50 239ms 4 May 2022 891st JayXon 🇺🇸 863 50 246ms 5 May 2022 891st Steffan153 🇫🇮 863 50 261ms 10 Dec 2022 891st ovs-code 🇩🇪 863 50 426ms 24 Oct 2023 891st sean-niemann 🇺🇸 863 50 280ms 12 Jul 2024 896th Setvizan 863 62 16ms 12 Jan 2023 896th GreenBeansAgainstVeganism 863 62 12ms 13 Jan 2023 896th arctouch-cristiannevianna 863 62 12ms 3 Apr 2023 896th Corxldyphik 863 62 11ms 11 Apr 2023 896th Blockyheadman 863 62 12ms 1 Nov 2023 896th ollyspooner 863 62 13ms 22 Nov 2023 896th itserasmus 863 62 14ms 25 Jan 2024 896th Jacob385 863 62 12ms 13 Mar 2024 896th junkondo-jp 863 62 11ms 30 Jun 2024 896th ShiraJoseph 🇺🇸 863 62 13ms 1 Mar 2025 896th tomh1012 863 62 12ms 3 Dec 2025 896th scpchicken 🇵🇼 863 62 11ms 7 hours ago 908th Shanethegamer 🇺🇸 863 70 104ms 12 Dec 2022 908th Alessandro-Balconi 🇮🇹 863 70 102ms 26 Dec 2022 910th emgordon154 863 160 1,737ms 24 Dec 2025 910th DialFrost 🇸🇬 863 160 1,683ms 17 Jan 2026 912th NewDefectus 🇮🇱 862 73 2ms 6 May 2022 912th Natanaelel 🇸🇪 862 73 2ms 15 Jun 2022 912th LorenzoDeGaspari 862 73 2ms 27 May 2024 912th Bpc-CPU 862 73 2ms 12 Jul 2025 912th AZTECCO 862 73 2ms 16 Sep 2025 912th CaedenHarper 🇨🇦 862 73 2ms 28 Sep 2025 912th prestosilver 🇺🇸 862 73 2ms 3 Dec 2025 912th albanian-laundromat 🇺🇸 862 73 3ms 20 Jan 2026 912th madex 🇩🇪 862 73 3ms 12 days ago 921st aditsu 862 77 2,321ms 23 Nov 2025 922nd frankgraziano 862 198 108ms 14 Oct 2025 923rd o0lit3 🇺🇸 861 54 7ms 22 Jun 2023 923rd Natanaelel 🇸🇪 861 54 7ms 10 Feb 2025 925th stefangimmillaro 861 112 341ms 26 Sep 2023 925th kkoenig 861 112 319ms 4 Jan 2024 927th Yewzir 🇧🇪 860 65 4ms 9 Oct 2023 927th MeWhenI 🇻🇦 860 65 4ms 10 Oct 2023 929th Liibe 860 97 471ms 25 Sep 2025 930th sultan 859 72 24ms 6 Jun 2022 930th annaproxy 859 72 24ms 22 Aug 2022 930th BlankSpruce 859 72 24ms 9 Sep 2022 930th ValentinCassayre 859 72 21ms 8 Oct 2022 930th mathb0y512 859 72 24ms 1 Dec 2022 930th NoahBolohan 🇨🇦 859 72 24ms 28 Feb 2023 930th neel11235813 859 72 23ms 8 Mar 2023 930th Kacarott 🇦🇺 859 72 16ms 24 Mar 2023 930th Fracture17 859 72 20ms 8 Apr 2023 930th ayushdewan 859 72 24ms 7 May 2023 930th PeterTillema 🇳🇱 859 72 25ms 17 Oct 2023 930th Glinte 859 72 25ms 11 Dec 2023 930th nanatsu8 859 72 25ms 11 May 2024 930th thej10n 859 72 19ms 12 Jun 2024 930th tobeannouncd 859 72 19ms 25 Apr 2025 930th YAJUE114514 859 72 17ms 15 Aug 2025 930th madex 🇩🇪 859 72 25ms 15 Mar 2026 930th solisolu 859 72 19ms 11 days ago 948th DialFrost 🇸🇬 859 86 1,299ms 10 Mar 2025 949th henrydukepickle 858 97 132ms 8 Jul 2025 950th yeminghan2021 858 99 57ms 3 Feb 2025 951st SirBogman 🇺🇸 857 55 42ms 5 May 2022 951st olivermrose 🇺🇸 857 55 43ms 6 May 2022 951st 4hg 🇺🇸 857 55 45ms 24 Aug 2022 951st DialFrost 🇸🇬 857 55 48ms 1 Jan 2023 951st error256 857 55 44ms 4 May 2024 956th JayXon 🇺🇸 857 56 1,560ms 9 May 2022 957th eshilo-draper 857 91 425ms 4 Sep 2022 957th ericlangedijk 🇸🇮 857 91 437ms 23 May 2023 957th KatieLG 🇬🇧 857 91 413ms 30 Apr 2024 957th Mikey-Beep 🇬🇧 857 91 403ms 3 Sep 2024 First Prev 881–960 of 3,772 Next Last