Card Number Validation in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 601st NotEvenIndian 521 124 11ms 22 Oct 2024 601st ridingqwerty 🇺🇸 521 124 17ms 16 Jan 2025 601st CommandLeo 🇮🇹 521 124 11ms 17 days ago 604th Macweese 521 178 403ms 3 Aug 2025 605th bnic24 516 125 23ms 3 Oct 2024 605th adoxography 516 125 12ms 22 Oct 2024 605th lelbal 516 125 10ms 9 days ago 608th bac0id 515 180 408ms 9 Jan 2025 609th sidok 514 109 276ms 13 Nov 2024 610th emgordon154 511 156 10ms 13 Dec 2024 611th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 612th dokutan 509 143 152ms 19 Oct 2024 613th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 614th CatsAreFluffy 508 127 18ms 30 Oct 2024 614th WillowWispy 508 127 11ms 25 May 2025 616th Chinay-Domitrix 🇺🇸 507 131 3,107ms 30 Mar 2025 617th msbranicky 507 138 4ms 3 Oct 2024 618th KatieLG 🇬🇧 507 140 380ms 1 Oct 2024 619th yoshykai 507 183 423ms 12 Apr 2025 620th Lv0Sys 🇵🇱 504 128 19ms 15 Jun 2025 621st albanian-laundromat 501 88 2ms 2 Jul 2025 622nd madex 🇩🇪 500 129 18ms 2 Oct 2024 622nd RedzGoose 🇦🇺 500 129 11ms 15 Oct 2024 622nd calebaitken 500 129 10ms 11 Apr 2025 625th MeWhenI 🇻🇦 499 149 45ms 4 Oct 2024 626th Europe2048 497 130 11ms 2 Oct 2024 626th nstearns96 🇬🇧 497 130 16ms 2 Oct 2024 626th rollershutter 497 130 11ms 10 Jan 2025 626th Stockoh 🇫🇷 497 130 18ms 4 Jul 2025 630th jlangvand 497 141 1ms 15 Oct 2024 630th HumanoidCPU 497 141 2ms 7 Mar 2025 632nd janAkali 🇷🇺 497 167 372ms 8 Oct 2024 633rd inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 633rd sciencejiho 493 131 19ms 11 Feb 2025 633rd Jaydosu 493 131 10ms 11 Apr 2025 636th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 637th HumanoidCPU 490 145 427ms 5 Oct 2024 638th Mabeloid 🇳🇴 485 133 11ms 2 Oct 2024 638th Emutis 🇱🇹 485 133 11ms 4 Feb 2025 640th h-hh-hhh 🇺🇦 485 177 69ms 2 Nov 2024 641st alphafalfa 479 92 2ms 8 Nov 2024 642nd KatieLG 🇬🇧 478 120 585ms 1 Oct 2024 643rd h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 644th mitzal 477 180 65ms 9 Feb 2025 645th sciencedjinn 475 136 10ms 8 Nov 2024 645th ihatethefrench 475 136 18ms 4 Jan 2025 647th ravnskjaer 🇩🇰 475 195 410ms 20 Dec 2024 648th MiffOttah 473 150 402ms 6 Oct 2024 649th kurkale6ka 471 137 22ms 16 Oct 2024 649th 4ndyJ 🇬🇧 471 137 11ms 14 Nov 2024 649th Mikey-Beep 🇬🇧 471 137 16ms 6 Aug 2025 649th wobblybits 471 137 21ms 17 Aug 2025 653rd iczelia 🇩🇪 469 94 3ms 23 Sep 2025 654th ejini6969 468 102 35ms 14 Jun 2025 655th luca1339 468 198 395ms 4 Nov 2024 656th scpchicken 🇵🇼 464 139 20ms 6 Oct 2024 657th NanduBC 461 140 10ms 1 Oct 2024 657th jmerle 🇳🇱 461 140 11ms 10 Jan 2025 657th RobertHoeh 461 140 10ms 3 Mar 2025 657th smilesformiles3 461 140 23ms 12 Jun 2025 657th artem-aramma 461 140 17ms 18 Jun 2025 662nd Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 663rd madex 🇩🇪 459 104 36ms 2 Oct 2024 664th Jacob385 459 202 436ms 2 Oct 2024 665th FranklinJiaChen 458 141 10ms 2 Oct 2024 666th brimstonetrader 455 142 11ms 17 Oct 2024 666th codewrite 🇬🇧 455 142 10ms 5 May 2025 666th RobGLambert 455 142 19ms 8 Jun 2025 669th dokutan 451 63 4ms 26 Nov 2024 670th GeneralFabian 451 143 13ms 9 Dec 2024 670th CutSandstone 451 143 11ms 30 Jan 2025 670th kistlerf 🇨🇭 451 143 16ms 19 May 2025 673rd IISResetMe 449 104 494ms 27 Mar 2025 674th hiichbindermax 448 144 18ms 2 Oct 2024 674th mathisfun271 448 144 10ms 14 Oct 2024 First Prev 601–675 of 780 Next Last