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 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 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 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 601st Chinay-Domitrix 🇺🇸 507 131 30 Mar 2025 602nd msbranicky 507 138 3 Oct 2024 603rd KatieLG 🇬🇧 506 140 1 Oct 2024 604th lelbal 504 128 2 Oct 2024 604th Lv0Sys 🇵🇱 504 128 15 Jun 2025 606th madex 🇩🇪 500 129 2 Oct 2024 606th RedzGoose 🇦🇺 500 129 15 Oct 2024 606th calebaitken 500 129 11 Apr 2025 609th albanian-laundromat 499 88 2 Jul 2025 610th MeWhenI 🇻🇦 499 149 4 Oct 2024 611th janAkali 🇷🇺 497 167 8 Oct 2024 612th Europe2048 496 130 2 Oct 2024 612th nstearns96 🇬🇧 496 130 2 Oct 2024 612th rollershutter 496 130 10 Jan 2025 612th Stockoh 🇫🇷 496 130 4 Jul 2025 616th jlangvand 496 141 15 Oct 2024 616th HumanoidCPU 496 141 7 Mar 2025 618th inverseLorentz 🇦🇺 492 131 7 Oct 2024 618th sciencejiho 492 131 11 Feb 2025 618th Jaydosu 492 131 11 Apr 2025 621st TheRealOhead 🇺🇸 491 131 1 Oct 2024 622nd HumanoidCPU 489 145 5 Oct 2024 623rd Mabeloid 🇳🇴 485 133 2 Oct 2024 623rd Emutis 🇱🇹 485 133 4 Feb 2025 625th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 626th Mabeloid 🇳🇴 483 145 2 Oct 2024 627th KatieLG 🇬🇧 478 120 1 Oct 2024 628th alphafalfa 477 92 8 Nov 2024 629th KatieLG 🇬🇧 476 108 13 Oct 2024 630th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 631st mitzal 476 180 9 Feb 2025 632nd sciencedjinn 474 136 8 Nov 2024 632nd ihatethefrench 474 136 4 Jan 2025 634th MiffOttah 473 150 6 Oct 2024 635th kurkale6ka 471 137 16 Oct 2024 635th 4ndyJ 🇬🇧 471 137 14 Nov 2024 635th Mikey-Beep 🇬🇧 471 137 6 Aug 2025 635th wobblybits 471 137 19 days ago 639th ejini6969 468 102 14 Jun 2025 640th scpchicken 🇵🇼 464 139 6 Oct 2024 641st NanduBC 461 140 1 Oct 2024 641st jmerle 🇳🇱 461 140 10 Jan 2025 641st RobertHoeh 461 140 3 Mar 2025 641st smilesformiles3 461 140 12 Jun 2025 641st artem-aramma 461 140 18 Jun 2025 646th Yewzir 🇧🇪 460 171 26 Dec 2024 647th madex 🇩🇪 459 104 2 Oct 2024 648th FranklinJiaChen 457 141 2 Oct 2024 649th brimstonetrader 454 142 17 Oct 2024 649th codewrite 🇬🇧 454 142 5 May 2025 649th RobGLambert 454 142 8 Jun 2025 649th blaztoma 🇱🇹 454 142 16 days ago 653rd dokutan 451 63 26 Nov 2024 654th GeneralFabian 451 143 9 Dec 2024 654th CutSandstone 451 143 30 Jan 2025 654th kistlerf 🇨🇭 451 143 19 May 2025 657th IISResetMe 449 104 27 Mar 2025 658th hiichbindermax 448 144 2 Oct 2024 658th mathisfun271 448 144 14 Oct 2024 658th bob-th 448 144 22 Oct 2024 661st varhammer 🇷🇺 448 223 23 Feb 2025 662nd dokutan 445 109 19 Oct 2024 663rd Flekay 🇩🇪 445 145 10 Jul 2025 664th grey0ut 444 105 11 Jan 2025 665th croc54 442 146 15 Dec 2024 666th MyXoToD 🇩🇪 440 146 26 May 2025 667th PyryL 🇫🇮 439 147 1 Mar 2025 668th mbittner20 436 148 13 Oct 2024 669th psaban 433 149 31 Jul 2025 670th dokutan 431 130 17 Oct 2024 671st Mabeloid 🇳🇴 431 133 2 Oct 2024 672nd jameswmccarty 430 150 5 Oct 2024 672nd yousefalizadeh 430 150 23 Oct 2024 672nd feherd 430 150 31 Oct 2024 672nd TheZwierzLF 🇵🇱 430 150 17 May 2025 Prev 601–675 of 751 Next