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 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 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 Transpose Sentence 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 Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Transpose Sentence 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 Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 524th Troon 536 120 17 Feb 2025 527th Sciman101 536 147 26 Mar 2025 528th msbranicky 530 175 13 Dec 2024 529th deancureton 529 121 30 Dec 2024 530th janAkali 🇷🇺 529 167 8 Oct 2024 531st chartung17 527 122 24 Mar 2025 532nd msbranicky 527 126 9 Jan 2025 533rd CaedenHarper 🇨🇦 524 109 9 Oct 2024 534th msbranicky 523 123 3 Oct 2024 534th bobbysq 523 123 5 Oct 2024 534th wuzekai518 523 123 8 Oct 2024 534th vhoulbreque 🇫🇷 523 123 4 Feb 2025 538th galloj 🇨🇿 522 112 4 Oct 2024 539th NotEvenIndian 519 124 22 Oct 2024 539th ridingqwerty 🇺🇸 519 124 16 Jan 2025 541st bnic24 515 125 3 Oct 2024 541st adoxography 515 125 22 Oct 2024 543rd sidok 514 109 13 Nov 2024 544th nephila-nacrea 🇬🇧 509 77 2 Oct 2024 545th dokutan 509 143 19 Oct 2024 546th KatieLG 🇬🇧 509 146 2 Oct 2024 547th CatsAreFluffy 507 127 30 Oct 2024 547th WillowWispy 507 127 7 days ago 549th Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 550th KatieLG 🇬🇧 506 140 1 Oct 2024 551st msbranicky 505 138 3 Oct 2024 552nd lelbal 503 128 2 Oct 2024 553rd madex 🇩🇪 499 129 2 Oct 2024 553rd RedzGoose 🇦🇺 499 129 15 Oct 2024 553rd calebaitken 499 129 11 Apr 2025 556th MeWhenI 🇻🇦 499 149 4 Oct 2024 557th Europe2048 495 130 2 Oct 2024 557th nstearns96 🇬🇧 495 130 2 Oct 2024 557th rollershutter 495 130 10 Jan 2025 560th jlangvand 495 141 15 Oct 2024 560th HumanoidCPU 495 141 7 Mar 2025 562nd Stockoh 🇫🇷 491 131 2 Oct 2024 562nd inverseLorentz 🇦🇺 491 131 7 Oct 2024 562nd sciencejiho 491 131 11 Feb 2025 562nd Jaydosu 491 131 11 Apr 2025 566th TheRealOhead 🇺🇸 489 131 1 Oct 2024 567th HumanoidCPU 488 145 5 Oct 2024 568th Mabeloid 🇳🇴 484 133 2 Oct 2024 568th Emutis 🇱🇹 484 133 4 Feb 2025 570th Mabeloid 🇳🇴 482 145 2 Oct 2024 571st h-hh-hhh 🇺🇦 482 177 2 Nov 2024 572nd alphafalfa 476 92 8 Nov 2024 573rd KatieLG 🇬🇧 476 108 13 Oct 2024 574th KatieLG 🇬🇧 476 120 1 Oct 2024 575th h-hh-hhh 🇺🇦 475 147 2 Nov 2024 576th mitzal 474 180 9 Feb 2025 577th sciencedjinn 473 136 8 Nov 2024 577th ihatethefrench 473 136 4 Jan 2025 579th MiffOttah 472 150 6 Oct 2024 580th Maximizer02 472 201 1 Oct 2024 581st kurkale6ka 470 137 16 Oct 2024 581st 4ndyJ 🇬🇧 470 137 14 Nov 2024 583rd BREMAUCY 🇫🇷 466 138 2 Oct 2024 584th scpchicken 🇵🇼 463 139 6 Oct 2024 585th varhammer 🇷🇺 463 223 23 Feb 2025 586th Yewzir 🇧🇪 460 171 26 Dec 2024 587th NanduBC 459 140 1 Oct 2024 587th Mikey-Beep 🇬🇧 459 140 7 Oct 2024 587th jmerle 🇳🇱 459 140 10 Jan 2025 587th RobertHoeh 459 140 3 Mar 2025 591st madex 🇩🇪 458 104 2 Oct 2024 592nd FranklinJiaChen 456 141 2 Oct 2024 593rd brimstonetrader 453 142 17 Oct 2024 593rd codewrite 🇬🇧 453 142 26 days ago 595th dokutan 450 63 26 Nov 2024 596th GeneralFabian 450 143 9 Dec 2024 596th CutSandstone 450 143 30 Jan 2025 596th kistlerf 🇨🇭 450 143 13 days ago 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