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) Taxicab Numbers 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 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) Taxicab Numbers 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 Turtle Tutorial # Golfer Points Chars Time Submitted 798th robin-scragg 860 65 23ms 8 Jun 2025 798th RaBa21 🇭🇺 860 65 26ms 11 Jul 2025 798th TransformLikeATensor 860 65 21ms 17 Oct 2025 804th Andriamanitra 🇫🇮 860 67 144ms 26 Apr 2023 805th ulucs 859 35 9ms 8 May 2022 805th bstrat 859 35 9ms 6 Jun 2024 805th wh3n3v3r 🇨🇿 859 35 8ms 18 Nov 2024 808th 5quiwyrm 859 52 264ms 4 Sep 2022 808th MeWhenI 🇻🇦 859 52 333ms 28 Jan 2023 808th Feniske 🇫🇷 859 52 254ms 7 Nov 2023 808th dcgjb 859 52 356ms 29 Jan 2024 808th JPRuskin 🇬🇧 859 52 263ms 7 Apr 2025 808th IISResetMe 859 52 232ms 7 Apr 2025 808th Ripick 859 52 237ms 1 Jun 2025 808th madex 🇩🇪 859 52 271ms 16 Mar 2026 816th rucin93 🇵🇱 859 57 141ms 4 Aug 2024 816th dokutan 859 57 133ms 9 Aug 2024 818th dokutan 859 79 10ms 27 Apr 2024 818th SwordF-Official 🇺🇸 859 79 10ms 1 Feb 2026 820th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 821st MeWhenI 🇻🇦 859 145 1,208ms 28 Mar 2025 822nd JRaspass 🇬🇧 858 41 361ms 4 May 2022 822nd SirBogman 🇺🇸 858 41 268ms 4 May 2022 822nd Natanaelel 🇸🇪 858 41 390ms 4 May 2022 825th jared-hughes 858 72 2ms 6 Jul 2022 825th Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 825th MeWhenI 🇻🇦 858 72 2ms 7 May 2023 825th ListeriaM 858 72 2ms 22 Aug 2023 825th larcherMTT 858 72 2ms 5 Oct 2024 825th snyderek 🇺🇸 858 72 2ms 19 Feb 2025 825th 5quiwyrm 858 72 2ms 29 Jun 2025 825th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 825th xiaoyiming123 858 72 2ms 12 Jul 2025 834th typeswitch-dev 🇵🇹 858 75 4ms 22 Jul 2023 835th Shanethegamer 🇺🇸 858 81 17ms 19 Dec 2023 835th emgordon154 858 81 20ms 29 Jul 2025 837th ovs-code 🇩🇪 857 83 57ms 1 Jul 2024 838th 386asm 🇺🇸 857 86 40ms 9 Apr 2023 838th DialFrost 🇸🇬 857 86 43ms 30 Dec 2025 840th Liibe 857 97 549ms 25 Sep 2025 840th Schmitt-Very-Cool 857 97 456ms 26 Sep 2025 842nd frankgraziano 857 198 108ms 14 Oct 2025 843rd Frowny 856 38 40ms 5 May 2022 843rd stackofbears 856 38 42ms 14 Mar 2025 845th yeminghan2021 856 99 57ms 3 Feb 2025 846th nwellnhof 🇩🇪 856 111 308ms 4 May 2022 846th stefangimmillaro 856 111 341ms 26 Sep 2023 846th kkoenig 856 111 319ms 4 Jan 2024 849th emgordon154 856 159 1,737ms 24 Dec 2025 849th DialFrost 🇸🇬 856 159 1,683ms 17 Jan 2026 851st DialFrost 🇸🇬 855 50 226ms 24 Oct 2023 852nd Shanethegamer 🇺🇸 855 70 105ms 12 Dec 2022 852nd Alessandro-Balconi 🇮🇹 855 70 106ms 26 Dec 2022 852nd snoozingnewt 🇨🇦 855 70 222ms 22 Nov 2025 855th aditsu 855 77 2,433ms 23 Nov 2025 856th eshilo-draper 854 91 425ms 4 Sep 2022 856th ericlangedijk 🇸🇮 854 91 437ms 23 May 2023 856th KatieLG 🇬🇧 854 91 413ms 30 Apr 2024 856th Mikey-Beep 🇬🇧 854 91 360ms 3 Sep 2024 860th henrydukepickle 854 97 132ms 8 Jul 2025 861st DialFrost 🇸🇬 853 86 1,476ms 10 Mar 2025 862nd MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 862nd Betuaredead 853 92 480ms 5 Jan 2023 862nd Yax42 🇫🇷 853 92 459ms 4 Oct 2025 865th o0lit3 🇺🇸 852 54 7ms 22 Jun 2023 865th Natanaelel 🇸🇪 852 54 7ms 10 Feb 2025 867th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 867th MeWhenI 🇻🇦 852 65 4ms 10 Oct 2023 869th mtirado1 850 74 94ms 24 Dec 2022 869th Betuaredead 850 74 88ms 6 Jan 2023 869th KatieLG 🇬🇧 850 74 94ms 15 Jan 2023 869th bwat2 850 74 87ms 31 Mar 2023 869th stackotter 850 74 91ms 29 May 2023 869th ovs-code 🇩🇪 850 74 93ms 17 Apr 2024 875th DialFrost 🇸🇬 850 76 82ms 17 Mar 2025 876th Shanethegamer 🇺🇸 850 99 25ms 27 Apr 2023 877th JayXon 🇺🇸 848 56 1,369ms 9 May 2022 878th shinh 847 52 38ms 29 Jun 2022 878th MeWhenI 🇻🇦 847 52 70ms 25 Jul 2023 880th the-zammers 847 68 165ms 2 Oct 2023 881st dokutan 847 82 21ms 1 Jul 2024 882nd lynn 847 96 29ms 11 Jul 2023 883rd jared-hughes 847 100 63ms 20 Jul 2022 883rd ZakkkkAttackkkk 🇵🇭 847 100 63ms 10 Aug 2022 883rd Walter225 847 100 62ms 25 Jul 2023 886th MeWhenI 🇻🇦 846 26 159ms 25 Aug 2022 886th AlephSquirrel 846 26 155ms 6 Jan 2023 886th ovs-code 🇩🇪 846 26 367ms 5 May 2024 886th saito-ta 🇯🇵 846 26 154ms 12 Dec 2024 890th Natanaelel 🇸🇪 846 57 453ms 17 Jan 2024 890th Kacarott 🇦🇺 846 57 461ms 10 Sep 2024 890th albanian-laundromat 🇺🇸 846 57 463ms 7 Oct 2025 893rd randolchance 846 63 10ms 8 Jan 2023 893rd CatsAreFluffy 846 63 11ms 18 Feb 2023 893rd amiralitaheri 846 63 11ms 23 Feb 2023 893rd RuyiLi 846 63 11ms 1 Apr 2023 893rd TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 893rd pfysches-boop 846 63 11ms 6 Aug 2023 893rd mhgockel 846 63 13ms 19 Aug 2023 893rd NickTheEASDude 🇺🇸 846 63 12ms 18 Jan 2024 First Prev 801–900 of 3,671 Next Last