Collatz in all languages in chars. 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 751st GrayJoKing 🇦🇺 860 56 411ms 15 Jan 2024 751st AlephSquirrel 860 56 426ms 21 Jan 2024 753rd Setvizan 860 62 10ms 12 Jan 2023 753rd GreenBeansAgainstVeganism 860 62 10ms 13 Jan 2023 753rd arctouch-cristiannevianna 860 62 10ms 3 Apr 2023 753rd Corxldyphik 860 62 10ms 11 Apr 2023 753rd Blockyheadman 860 62 10ms 1 Nov 2023 753rd ollyspooner 860 62 10ms 22 Nov 2023 753rd itserasmus 860 62 10ms 25 Jan 2024 753rd Jacob385 860 62 10ms 13 Mar 2024 753rd junkondo-jp 860 62 11ms 30 Jun 2024 753rd ShiraJoseph 🇺🇸 860 62 9ms 1 Mar 2025 753rd tomh1012 860 62 9ms 7 days ago 764th yzhs 🇩🇪 860 65 19ms 16 Jun 2022 764th rollershutter 860 65 20ms 9 Sep 2022 764th bac0id 860 65 20ms 26 Sep 2023 764th robin-scragg 860 65 23ms 8 Jun 2025 764th RaBa21 🇭🇺 860 65 29ms 11 Jul 2025 764th TransformLikeATensor 860 65 20ms 17 Oct 2025 770th Andriamanitra 🇫🇮 860 67 144ms 26 Apr 2023 771st Shanethegamer 🇺🇸 860 97 106ms 15 Apr 2025 771st GolfingSuccess 🇬🇷 860 97 98ms 12 days ago 771st DialFrost 🇸🇬 860 97 94ms 9 days ago 774th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 775th MeWhenI 🇻🇦 859 145 470ms 28 Mar 2025 776th ulucs 858 35 9ms 8 May 2022 776th bstrat 858 35 9ms 6 Jun 2024 776th wh3n3v3r 🇨🇿 858 35 8ms 18 Nov 2024 779th JRaspass 🇬🇧 858 41 358ms 4 May 2022 779th SirBogman 🇺🇸 858 41 300ms 4 May 2022 779th Natanaelel 🇸🇪 858 41 365ms 4 May 2022 782nd 5quiwyrm 858 52 279ms 4 Sep 2022 782nd MeWhenI 🇻🇦 858 52 261ms 28 Jan 2023 782nd Feniske 🇫🇷 858 52 208ms 7 Nov 2023 782nd dcgjb 858 52 251ms 29 Jan 2024 782nd JPRuskin 🇬🇧 858 52 290ms 7 Apr 2025 782nd IISResetMe 858 52 259ms 7 Apr 2025 782nd Ripick 858 52 261ms 1 Jun 2025 789th Yewzir 🇧🇪 858 160 2,399ms 27 days ago 790th jared-hughes 857 72 2ms 6 Jul 2022 790th Steffan153 🇫🇮 857 72 2ms 3 Jan 2023 790th MeWhenI 🇻🇦 857 72 3ms 7 May 2023 790th ListeriaM 857 72 2ms 22 Aug 2023 790th larcherMTT 857 72 2ms 5 Oct 2024 790th snyderek 🇺🇸 857 72 3ms 19 Feb 2025 790th 5quiwyrm 857 72 2ms 29 Jun 2025 790th TeodorDyakov 🇧🇬 857 72 3ms 8 Jul 2025 790th xiaoyiming123 857 72 2ms 12 Jul 2025 799th typeswitch-dev 🇵🇹 856 75 4ms 22 Jul 2023 800th ovs-code 🇩🇪 856 83 54ms 1 Jul 2024 801st Liibe 856 97 391ms 25 Sep 2025 801st Schmitt-Very-Cool 856 97 435ms 26 Sep 2025 803rd nwellnhof 🇩🇪 856 111 271ms 4 May 2022 803rd stefangimmillaro 856 111 268ms 26 Sep 2023 803rd kkoenig 856 111 287ms 4 Jan 2024 806th frankgraziano 856 198 113ms 14 Oct 2025 807th Frowny 855 38 40ms 5 May 2022 807th stackofbears 855 38 42ms 14 Mar 2025 809th 386asm 🇺🇸 855 86 40ms 9 Apr 2023 810th DialFrost 🇸🇬 854 50 237ms 24 Oct 2023 811th MeWhenI 🇻🇦 854 71 106ms 13 Dec 2022 812th henrydukepickle 854 97 138ms 8 Jul 2025 813th yeminghan2021 854 99 51ms 3 Feb 2025 814th aditsu 853 77 2,554ms 17 days ago 815th eshilo-draper 853 91 317ms 4 Sep 2022 815th ericlangedijk 🇸🇮 853 91 330ms 23 May 2023 815th KatieLG 🇬🇧 853 91 333ms 30 Apr 2024 815th Mikey-Beep 🇬🇧 853 91 316ms 3 Sep 2024 819th ovs-code 🇩🇪 853 161 1,719ms 14 Sep 2025 820th frosster 852 76 7ms 12 May 2023 820th kyleclaassen 852 76 7ms 20 May 2023 820th NickTheEASDude 🇺🇸 852 76 6ms 7 May 2024 820th koipondx86 852 76 7ms 8 Nov 2024 824th Shanethegamer 🇺🇸 852 83 1,291ms 4 May 2022 825th MeWhenI 🇻🇦 852 92 398ms 10 Oct 2022 First Prev 751–825 of 3,489 Next Last