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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 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 Huffman Encoder 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 Huffman Encoder 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 Chars Time Submitted 501st GrayJoKing 🇦🇺 893 91 30ms 19 Jan 2023 502nd m-tkach 🇺🇦 893 117 25ms 7 May 2022 502nd Lydxn 🇨🇦 893 117 26ms 7 May 2022 504th edsrzf 🇳🇿 892 78 12ms 26 Oct 2024 505th GolfingSuccess 🇬🇷 892 95 61ms 5 May 2022 505th Alex-x90 🇺🇸 892 95 64ms 4 Dec 2022 505th Mandrzejy 🇵🇱 892 95 59ms 22 Mar 2024 505th roupiq 🇵🇱 892 95 61ms 9 days ago 509th p-zubieta 891 48 295ms 6 Mar 2024 510th Ripick 891 73 136ms 8 May 2023 511th edsrzf 🇳🇿 891 78 17ms 16 Aug 2025 512th dokutan 891 88 425ms 15 Feb 2026 513th oeb25 891 93 129ms 16 May 2022 513th snobee 🇨🇦 891 93 130ms 8 Dec 2022 513th logvp 891 93 127ms 2 Jan 2024 513th smartiel 891 93 128ms 12 Aug 2024 513th trist224 🇫🇷 891 93 125ms 12 Aug 2024 513th nullie 891 93 134ms 19 Dec 2024 513th lolgeny 891 93 135ms 22 Feb 2025 520th JayXon 🇺🇸 890 74 2,567ms 5 days ago 521st Steffan153 🇫🇮 890 80 28ms 15 Nov 2022 521st error256 890 80 117ms 8 Apr 2025 523rd KatieLG 🇬🇧 889 60 11ms 4 May 2022 523rd ScottHamper 889 60 13ms 5 May 2022 523rd Re-Adventures 🇮🇳 889 60 13ms 5 May 2022 523rd 0x24a537r9 889 60 13ms 29 Jul 2022 523rd stefangabos 🇷🇴 889 60 12ms 19 Aug 2022 523rd eranws 889 60 11ms 10 Sep 2022 523rd GeorgeStechman 🇬🇧 889 60 12ms 26 Sep 2022 523rd BloodStormKnight 889 60 15ms 15 Oct 2022 523rd dzshn 889 60 14ms 3 Dec 2022 523rd biocommando 🇫🇮 889 60 14ms 20 Dec 2022 523rd Betuaredead 889 60 12ms 5 Jan 2023 523rd piano-miles 889 60 10ms 16 Jan 2023 523rd Yewzir 🇧🇪 889 60 12ms 12 Feb 2023 523rd shellbertt 🇨🇦 889 60 12ms 26 Feb 2023 523rd zakariamouhid 889 60 12ms 20 May 2023 523rd raphaelimahorn 889 60 11ms 23 Aug 2023 523rd jbt 889 60 11ms 25 Dec 2023 523rd olleicua 🇺🇸 889 60 12ms 15 Feb 2024 523rd HumanoidCPU 889 60 14ms 3 May 2024 523rd dokutan 889 60 11ms 13 Aug 2024 523rd LostSyntax21 🇬🇧 889 60 12ms 10 Sep 2024 523rd xyangst 889 60 14ms 28 Sep 2024 523rd a6166231 🇨🇳 889 60 12ms 15 May 2025 523rd SebassNoob 889 60 14ms 5 Aug 2025 523rd levinwinter 889 60 14ms 22 Oct 2025 523rd Cube14yt 889 60 11ms 16 Nov 2025 523rd gigaprofisi 🇺🇸 889 60 10ms 17 Nov 2025 523rd amazingalek 🇳🇴 889 60 12ms 20 Dec 2025 523rd shandriy 889 60 12ms 23 Jan 2026 523rd spidunno 889 60 11ms 17 Feb 2026 553rd jared-hughes 889 130 22ms 15 Dec 2024 554th P-Quentin 🇫🇷 888 63 21ms 3 Aug 2022 554th kaptsanovb 888 63 29ms 20 Apr 2023 554th fkantelberg 888 63 20ms 14 Jul 2023 554th VictorStenvers 🇳🇱 888 63 27ms 13 Nov 2023 554th 1231234md5 🇨🇳 888 63 21ms 14 Dec 2023 554th f-tucker 888 63 24ms 6 Feb 2024 554th JunkIce 888 63 25ms 24 Nov 2024 554th Kowalskiexe 🇵🇱 888 63 21ms 19 Apr 2025 554th 123mjb 888 63 24ms 2 Jun 2025 554th DrakeSeteraO 888 63 63ms 24 Oct 2025 554th enigma 888 63 38ms 21 Dec 2025 554th ASampsonMu31 888 63 52ms 13 Mar 2026 554th cuvam 🇺🇸 888 63 52ms 5 days ago 567th Lydxn 🇨🇦 888 107 322ms 6 May 2022 567th CaedenHarper 🇨🇦 888 107 346ms 5 Oct 2025 569th canissimia 🇦🇶 888 110 3,055ms 20 Feb 2023 570th canissimia 🇦🇶 888 204 16ms 25 Nov 2023 571st Shanethegamer 🇺🇸 887 61 4ms 31 Oct 2022 571st MeWhenI 🇻🇦 887 61 4ms 4 Nov 2022 573rd Shanethegamer 🇺🇸 887 72 145ms 8 May 2025 573rd edsrzf 🇳🇿 887 72 144ms 4 Jul 2025 573rd Yewzir 🇧🇪 887 72 134ms 20 Nov 2025 576th lynn 886 65 267ms 5 May 2022 576th GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 576th Sakisan 🇧🇪 886 65 178ms 6 May 2022 576th JayXon 🇺🇸 886 65 271ms 17 Oct 2022 576th Steffan153 🇫🇮 886 65 181ms 12 Nov 2022 576th tobeannouncd 886 65 302ms 25 Apr 2025 576th sean-niemann 🇺🇸 886 65 168ms 9 Jun 2025 583rd stefangimmillaro 886 71 95ms 2 Oct 2022 583rd Steffan153 🇫🇮 886 71 106ms 23 Feb 2023 583rd Shanethegamer 🇺🇸 886 71 101ms 16 May 2023 583rd sean-niemann 🇺🇸 886 71 100ms 12 Jul 2024 587th DialFrost 🇸🇬 886 95 30ms 10 Dec 2024 587th snoozingnewt 🇨🇦 886 95 112ms 4 Dec 2025 587th Steffan153 🇫🇮 886 95 111ms 27 Feb 2026 590th Steffan153 🇫🇮 885 52 7ms 31 Dec 2022 590th blaztoma 🇱🇹 885 52 8ms 18 Jan 2026 592nd GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 593rd m-tkach 🇺🇦 885 112 116ms 22 Jun 2025 594th frankgraziano 884 75 18ms 23 Feb 2026 595th albanian-laundromat 🇺🇸 884 94 455ms 24 Sep 2025 595th jkelly467 884 94 481ms 23 Oct 2025 595th HumanoidCPU 884 94 507ms 8 Nov 2025 598th GrayJoKing 🇦🇺 883 70 2ms 6 May 2022 598th ovs-code 🇩🇪 883 70 2ms 8 Oct 2023 598th 09cf 883 70 2ms 8 Oct 2023 First Prev 501–600 of 3,667 Next Last