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 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 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 ArkScript 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 ArkScript 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 Calendar 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 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 793rd xiaoyiming123 857 72 2ms 12 Jul 2025 802nd DialFrost 🇸🇬 857 83 19ms 17 days ago 803rd Liibe 857 97 391ms 25 Sep 2025 803rd Schmitt-Very-Cool 857 97 435ms 26 Sep 2025 805th typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 806th ovs-code 🇩🇪 856 83 54ms 1 Jul 2024 807th 386asm 🇺🇸 856 86 40ms 9 Apr 2023 807th DialFrost 🇸🇬 856 86 43ms 19 days ago 809th nwellnhof 🇩🇪 856 111 250ms 4 May 2022 809th stefangimmillaro 856 111 238ms 26 Sep 2023 809th kkoenig 856 111 247ms 4 Jan 2024 812th frankgraziano 856 198 108ms 14 Oct 2025 813th Frowny 855 38 40ms 5 May 2022 813th stackofbears 855 38 42ms 14 Mar 2025 815th DialFrost 🇸🇬 855 50 260ms 24 Oct 2023 816th dokutan 855 79 11ms 27 Apr 2024 817th Shanethegamer 🇺🇸 854 70 99ms 12 Dec 2022 817th Alessandro-Balconi 🇮🇹 854 70 95ms 26 Dec 2022 817th snoozingnewt 🇨🇦 854 70 207ms 22 Nov 2025 820th henrydukepickle 854 97 118ms 8 Jul 2025 821st yeminghan2021 854 99 54ms 3 Feb 2025 822nd aditsu 853 77 2,388ms 23 Nov 2025 823rd eshilo-draper 853 91 396ms 4 Sep 2022 823rd ericlangedijk 🇸🇮 853 91 428ms 23 May 2023 823rd KatieLG 🇬🇧 853 91 419ms 30 Apr 2024 823rd Mikey-Beep 🇬🇧 853 91 388ms 3 Sep 2024 827th MeWhenI 🇻🇦 853 92 398ms 10 Oct 2022 827th Betuaredead 853 92 468ms 5 Jan 2023 827th Yax42 🇫🇷 853 92 420ms 4 Oct 2025 830th ovs-code 🇩🇪 853 161 1,719ms 14 Sep 2025 831st Shanethegamer 🇺🇸 852 83 1,374ms 4 May 2022 832nd o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 832nd Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 834th Shanethegamer 🇺🇸 851 58 767ms 17 Sep 2025 835th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 835th MeWhenI 🇻🇦 851 65 3ms 10 Oct 2023 837th SirBogman 🇺🇸 850 55 38ms 5 May 2022 837th olivermrose 🇺🇸 850 55 42ms 6 May 2022 837th 4hg 🇺🇸 850 55 51ms 24 Aug 2022 837th DialFrost 🇸🇬 850 55 43ms 1 Jan 2023 837th error256 850 55 40ms 4 May 2024 842nd mtirado1 850 74 79ms 24 Dec 2022 842nd Betuaredead 850 74 81ms 6 Jan 2023 842nd KatieLG 🇬🇧 850 74 81ms 15 Jan 2023 842nd bwat2 850 74 82ms 31 Mar 2023 842nd stackotter 850 74 78ms 29 May 2023 842nd ovs-code 🇩🇪 850 74 82ms 17 Apr 2024 842nd madeforlosers 850 74 80ms 21 Nov 2024 849th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 850th JayXon 🇺🇸 848 56 1,185ms 9 May 2022 851st the-zammers 847 68 172ms 2 Oct 2023 852nd MeWhenI 🇻🇦 846 26 155ms 25 Aug 2022 852nd AlephSquirrel 846 26 152ms 6 Jan 2023 852nd ovs-code 🇩🇪 846 26 373ms 5 May 2024 852nd saito-ta 🇯🇵 846 26 150ms 12 Dec 2024 856th randolchance 846 63 12ms 8 Jan 2023 856th CatsAreFluffy 846 63 11ms 18 Feb 2023 856th amiralitaheri 846 63 11ms 23 Feb 2023 856th RuyiLi 846 63 10ms 1 Apr 2023 856th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 856th pfysches-boop 846 63 12ms 6 Aug 2023 856th mhgockel 846 63 11ms 19 Aug 2023 856th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 856th 823126 846 63 11ms 14 Nov 2024 856th Palladium02 846 63 11ms 12 May 2025 856th 4very 846 63 10ms 10 Jun 2025 856th Ultra814 846 63 11ms 21 Aug 2025 868th NewDefectus 🇮🇱 846 73 3ms 6 May 2022 868th inventshah 846 73 2ms 12 Jun 2022 868th Natanaelel 🇸🇪 846 73 3ms 15 Jun 2022 868th Herbert00709 🇵🇱 846 73 2ms 22 Dec 2023 868th LorenzoDeGaspari 846 73 2ms 27 May 2024 868th Bpc-CPU 846 73 2ms 12 Jul 2025 868th AZTECCO 846 73 2ms 16 Sep 2025 868th CaedenHarper 🇨🇦 846 73 2ms 28 Sep 2025 868th prestosilver 🇺🇸 846 73 2ms 3 Dec 2025 877th jared-hughes 846 100 58ms 20 Jul 2022 877th ZakkkkAttackkkk 🇵🇭 846 100 56ms 10 Aug 2022 877th Walter225 846 100 58ms 25 Jul 2023 880th Natanaelel 🇸🇪 845 57 409ms 17 Jan 2024 First Prev 801–880 of 3,509 Next Last