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 896th madeforlosers 843 92 365ms 21 Nov 2024 896th ChromaChroma 843 92 354ms 7 Oct 2025 896th snoozingnewt 🇨🇦 843 92 379ms 8 Oct 2025 904th dokutan 843 93 428ms 27 Sep 2025 905th krcs 🇵🇱 842 53 282ms 9 May 2022 905th ryanlanegit 842 53 301ms 19 Jun 2022 905th sisyphus-ppcg 🇦🇺 842 53 456ms 15 Aug 2022 908th SirBogman 🇺🇸 842 89 38ms 4 May 2022 909th error256 841 81 71ms 13 Sep 2024 910th CLOStrophobic 🇮🇹 841 89 42ms 14 Feb 2025 911th kmathis22 841 100 31ms 13 Nov 2025 912th raszpi 🇭🇺 840 77 103ms 1 Sep 2023 913th eshilo-draper 839 75 86ms 6 Sep 2022 913th kmathis22 839 75 79ms 5 Sep 2025 915th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 916th beardotpdf 839 99 346ms 2 days ago 917th emplv 🇱🇻 839 124 25ms 31 Oct 2022 918th Codsilla 🇨🇦 838 51 230ms 1 Jul 2022 919th frankgraziano 838 66 4ms 20 Apr 2025 920th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 920th Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 922nd MeWhenI 🇻🇦 838 164 1,639ms 7 Nov 2025 923rd ovs-code 🇩🇪 837 85 15ms 11 Dec 2023 924th dokutan 837 88 39ms 9 Jun 2024 925th Steffan153 🇫🇮 837 97 29ms 18 Jan 2023 926th CatsAreFluffy 837 101 54ms 18 Feb 2023 926th annaproxy 837 101 55ms 9 May 2023 926th wojtekmal 837 101 52ms 15 Nov 2023 926th HumanoidCPU 837 101 55ms 6 May 2024 926th eMGeeneer 837 101 379ms 27 Jun 2024 926th bac0id 837 101 54ms 29 Jun 2024 926th michaelmoynihan 837 101 399ms 3 Sep 2025 926th snoozingnewt 🇨🇦 837 101 382ms 6 Oct 2025 934th SirBogman 🇺🇸 835 36 14ms 5 May 2022 934th Natanaelel 🇸🇪 835 36 87ms 15 Jun 2022 934th Steffan153 🇫🇮 835 36 91ms 18 Jan 2023 934th codereport 🇨🇦 835 36 9ms 1 Jun 2024 934th GolfinK 835 36 9ms 21 Nov 2024 934th lifthrasiir 🇰🇷 835 36 10ms 1 Dec 2024 934th GolfingSuccess 🇬🇷 835 36 11ms 20 Mar 2025 941st scpchicken 🇵🇼 835 55 10ms 4 May 2022 941st SirBogman 🇺🇸 835 55 6ms 5 May 2022 941st Shanethegamer 🇺🇸 835 55 6ms 19 May 2023 941st DialFrost 🇸🇬 835 55 10ms 14 Feb 2025 945th inverseLorentz 🇦🇺 835 69 156ms 3 Jun 2024 945th Yewzir 🇧🇪 835 69 118ms 24 Dec 2024 945th CLOStrophobic 🇮🇹 835 69 170ms 28 May 2025 948th ChiefChippy2 834 56 40ms 4 May 2022 948th aksyristos 834 56 36ms 29 Jan 2023 948th anter69 🇭🇺 834 56 35ms 12 Feb 2024 948th 3dm4n 🇫🇮 834 56 37ms 11 Mar 2024 948th lgrandco 834 56 39ms 9 Oct 2024 948th tatzyr 🇯🇵 834 56 38ms 10 Dec 2024 948th D-MOVE 🇵🇭 834 56 36ms 6 days ago 955th moustave 834 67 23ms 7 Nov 2024 956th Alex-x90 🇺🇸 834 74 2ms 4 Dec 2022 956th undersquire 834 74 2ms 24 Jun 2023 956th rdmsr 834 74 2ms 24 Jun 2023 956th Bmrl7 834 74 2ms 9 Jul 2023 956th Vinterion 834 74 4ms 6 Nov 2023 956th namelessiw 834 74 2ms 28 Dec 2023 956th Jonatan6 🇩🇰 834 74 2ms 15 Mar 2024 956th Mandrzejy 🇵🇱 834 74 2ms 12 Apr 2024 956th kaurakeksi 🇫🇮 834 74 2ms 29 Dec 2024 965th Shanethegamer 🇺🇸 834 82 141ms 15 May 2023 966th p-vf 🇨🇭 834 93 337ms 24 Jun 2022 966th Smetalo 834 93 384ms 25 Aug 2022 966th malworthy 834 93 360ms 19 Aug 2024 969th Grrisly 834 114 287ms 25 Mar 2024 970th Natanaelel 🇸🇪 833 39 131ms 10 Feb 2025 971st Steffan153 🇫🇮 833 55 79ms 21 Dec 2022 972nd Shanethegamer 🇺🇸 833 57 1,051ms 15 Dec 2022 972nd anter69 🇭🇺 833 57 876ms 23 Feb 2023 972nd stefangimmillaro 833 57 891ms 6 May 2023 975th elisherer 🇮🇱 833 64 10ms 5 Jun 2022 First Prev 901–975 of 3,496 Next Last