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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 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 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 891st 4very 846 63 10ms 10 Jun 2025 891st Ultra814 846 63 13ms 21 Aug 2025 903rd NewDefectus 🇮🇱 846 73 2ms 6 May 2022 903rd inventshah 846 73 2ms 12 Jun 2022 903rd Natanaelel 🇸🇪 846 73 2ms 15 Jun 2022 903rd LorenzoDeGaspari 846 73 2ms 27 May 2024 903rd Bpc-CPU 846 73 2ms 12 Jul 2025 903rd AZTECCO 846 73 2ms 16 Sep 2025 903rd CaedenHarper 🇨🇦 846 73 2ms 28 Sep 2025 903rd prestosilver 🇺🇸 846 73 2ms 3 Dec 2025 903rd albanian-laundromat 🇺🇸 846 73 3ms 20 Jan 2026 903rd madex 🇩🇪 846 73 2ms 20 Mar 2026 913th Shanethegamer 🇺🇸 846 98 129ms 26 Oct 2022 913th emgordon154 846 98 128ms 18 Feb 2025 915th retrohun 845 64 4ms 6 Nov 2022 915th Re-Adventures 🇮🇳 845 64 4ms 7 Nov 2022 915th stellartux 845 64 4ms 26 Dec 2023 915th bac0id 845 64 4ms 29 Jun 2024 915th snoozingnewt 🇨🇦 845 64 4ms 1 Sep 2024 915th albanian-laundromat 🇺🇸 845 64 4ms 22 Sep 2025 921st janAkali 🇷🇺 844 77 137ms 12 Feb 2025 922nd bschorno 844 92 410ms 12 Oct 2022 922nd ChrisTheisen 844 92 423ms 14 Dec 2022 922nd kellantech 844 92 395ms 4 Jul 2023 922nd Mezzofloat 844 92 417ms 26 Aug 2023 922nd Maximizer02 844 92 428ms 1 Oct 2023 922nd madeforlosers 844 92 366ms 21 Nov 2024 922nd ChromaChroma 844 92 398ms 7 Oct 2025 922nd snoozingnewt 🇨🇦 844 92 433ms 8 Oct 2025 930th DialFrost 🇸🇬 843 66 85ms 7 Apr 2025 930th KasperKivimaeki 🇫🇮 843 66 8ms 22 Dec 2025 932nd MeWhenI 🇻🇦 843 71 111ms 13 Dec 2022 933rd emplv 🇱🇻 843 124 25ms 31 Oct 2022 933rd emgordon154 843 124 27ms 29 Mar 2026 935th krcs 🇵🇱 842 53 319ms 9 May 2022 935th ryanlanegit 842 53 311ms 19 Jun 2022 935th sisyphus-ppcg 🇦🇺 842 53 493ms 15 Aug 2022 938th Natanaelel 🇸🇪 842 87 1,558ms 15 Jun 2022 939th SirBogman 🇺🇸 842 89 38ms 4 May 2022 940th error256 841 81 68ms 13 Sep 2024 941st CLOStrophobic 🇮🇹 841 89 42ms 14 Feb 2025 942nd kmathis22 841 100 42ms 13 Nov 2025 943rd sean-niemann 🇺🇸 840 76 141ms 8 Oct 2024 944th raszpi 🇭🇺 840 77 117ms 1 Sep 2023 945th beardotpdf 840 99 512ms 12 Dec 2025 946th GolfingSuccess 🇬🇷 840 109 13ms 19 Mar 2026 947th MeWhenI 🇻🇦 840 162 1,710ms 8 days ago 948th frankgraziano 839 66 4ms 20 Apr 2025 949th Yewzir 🇧🇪 839 69 126ms 24 Dec 2024 949th albanian-laundromat 🇺🇸 839 69 106ms 27 Feb 2026 951st eshilo-draper 839 75 96ms 6 Sep 2022 951st kmathis22 839 75 90ms 5 Sep 2025 953rd CatsAreFluffy 839 101 62ms 18 Feb 2023 953rd annaproxy 839 101 62ms 9 May 2023 953rd wojtekmal 839 101 63ms 15 Nov 2023 953rd HumanoidCPU 839 101 64ms 6 May 2024 953rd eMGeeneer 839 101 416ms 27 Jun 2024 953rd bac0id 839 101 63ms 29 Jun 2024 953rd michaelmoynihan 839 101 433ms 3 Sep 2025 953rd snoozingnewt 🇨🇦 839 101 452ms 6 Oct 2025 961st Codsilla 🇨🇦 838 51 241ms 1 Jul 2022 962nd DialFrost 🇸🇬 838 56 890ms 1 Sep 2025 962nd GolfingSuccess 🇬🇷 838 56 831ms 17 Feb 2026 964th steffan-polygolf 838 81 9ms 23 Feb 2023 964th FranklinJiaChen 838 81 9ms 23 Feb 2026 966th Andriamanitra 🇫🇮 838 83 12ms 17 Apr 2023 966th Natanaelel 🇸🇪 838 83 12ms 8 Jul 2023 968th dokutan 838 88 39ms 9 Jun 2024 969th Steffan153 🇫🇮 838 97 30ms 18 Jan 2023 970th DialFrost 🇸🇬 837 83 17ms 1 Jan 2026 971st scpchicken 🇵🇼 836 55 10ms 4 May 2022 971st SirBogman 🇺🇸 836 55 6ms 5 May 2022 971st Shanethegamer 🇺🇸 836 55 6ms 19 May 2023 971st DialFrost 🇸🇬 836 55 11ms 14 Feb 2025 975th SirBogman 🇺🇸 835 36 9ms 5 May 2022 975th Natanaelel 🇸🇪 835 36 87ms 15 Jun 2022 975th Steffan153 🇫🇮 835 36 91ms 18 Jan 2023 975th codereport 🇨🇦 835 36 9ms 1 Jun 2024 975th GolfinK 835 36 8ms 21 Nov 2024 975th lifthrasiir 🇰🇷 835 36 9ms 1 Dec 2024 975th GolfingSuccess 🇬🇷 835 36 11ms 20 Mar 2025 975th scpchicken 🇵🇼 835 36 8ms 10 Mar 2026 983rd moustave 835 67 23ms 7 Nov 2024 984th inverseLorentz 🇦🇺 835 69 154ms 3 Jun 2024 984th CLOStrophobic 🇮🇹 835 69 170ms 28 May 2025 986th Alex-x90 🇺🇸 835 74 2ms 4 Dec 2022 986th undersquire 835 74 2ms 24 Jun 2023 986th rdmsr 835 74 2ms 24 Jun 2023 986th Bmrl7 835 74 2ms 9 Jul 2023 986th Vinterion 835 74 2ms 6 Nov 2023 986th namelessiw 835 74 2ms 28 Dec 2023 986th Jonatan6 🇩🇰 835 74 2ms 15 Mar 2024 986th Mandrzejy 🇵🇱 835 74 2ms 12 Apr 2024 986th kaurakeksi 🇫🇮 835 74 2ms 29 Dec 2024 995th p-vf 🇨🇭 835 93 406ms 24 Jun 2022 995th Smetalo 835 93 418ms 25 Aug 2022 995th malworthy 835 93 381ms 19 Aug 2024 998th nwellnhof 🇩🇪 835 117 1,730ms 16 Nov 2022 999th Grrisly 834 114 332ms 25 Mar 2024 1,000th Natanaelel 🇸🇪 833 39 131ms 10 Feb 2025 First Prev 901–1,000 of 3,664 Next Last