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 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 Hilbert Curve 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 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 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 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 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 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 Hilbert Curve 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 600th sciencejiho 492 131 11 Feb 2025 600th Jaydosu 492 131 11 Apr 2025 603rd TheRealOhead 🇺🇸 490 131 1 Oct 2024 604th HumanoidCPU 488 145 5 Oct 2024 605th Mabeloid 🇳🇴 485 133 2 Oct 2024 605th Emutis 🇱🇹 485 133 4 Feb 2025 607th h-hh-hhh 🇺🇦 484 177 2 Nov 2024 608th Mabeloid 🇳🇴 483 145 2 Oct 2024 609th alphafalfa 477 92 8 Nov 2024 610th KatieLG 🇬🇧 477 120 1 Oct 2024 611th KatieLG 🇬🇧 476 108 13 Oct 2024 612th h-hh-hhh 🇺🇦 476 147 2 Nov 2024 613th mitzal 476 180 9 Feb 2025 614th sciencedjinn 474 136 8 Nov 2024 614th ihatethefrench 474 136 4 Jan 2025 616th MiffOttah 472 150 6 Oct 2024 617th kurkale6ka 470 137 16 Oct 2024 617th 4ndyJ 🇬🇧 470 137 14 Nov 2024 619th Maximizer02 468 201 1 Oct 2024 620th ejini6969 467 102 14 Jun 2025 621st scpchicken 🇵🇼 464 139 6 Oct 2024 622nd NanduBC 460 140 1 Oct 2024 622nd Mikey-Beep 🇬🇧 460 140 7 Oct 2024 622nd jmerle 🇳🇱 460 140 10 Jan 2025 622nd RobertHoeh 460 140 3 Mar 2025 622nd smilesformiles3 460 140 12 Jun 2025 622nd artem-aramma 460 140 18 Jun 2025 628th Yewzir 🇧🇪 460 171 26 Dec 2024 629th madex 🇩🇪 458 104 2 Oct 2024 630th FranklinJiaChen 457 141 2 Oct 2024 631st brimstonetrader 454 142 17 Oct 2024 631st codewrite 🇬🇧 454 142 5 May 2025 631st RobGLambert 454 142 8 Jun 2025 634th dokutan 451 63 26 Nov 2024 635th GeneralFabian 451 143 9 Dec 2024 635th CutSandstone 451 143 30 Jan 2025 635th kistlerf 🇨🇭 451 143 19 May 2025 638th IISResetMe 449 104 27 Mar 2025 639th hiichbindermax 448 144 2 Oct 2024 639th mathisfun271 448 144 14 Oct 2024 639th bob-th 448 144 22 Oct 2024 642nd varhammer 🇷🇺 448 223 23 Feb 2025 643rd dokutan 445 109 19 Oct 2024 644th grey0ut 444 105 11 Jan 2025 645th Flekay 🇩🇪 444 145 22 days ago 646th croc54 441 146 15 Dec 2024 647th MyXoToD 🇩🇪 440 146 26 May 2025 648th PyryL 🇫🇮 438 147 1 Mar 2025 649th mbittner20 435 148 13 Oct 2024 650th psaban 433 149 34 hours ago 651st dokutan 431 130 17 Oct 2024 652nd Mabeloid 🇳🇴 430 133 2 Oct 2024 653rd jameswmccarty 430 150 5 Oct 2024 653rd yousefalizadeh 430 150 23 Oct 2024 653rd feherd 430 150 31 Oct 2024 653rd TheZwierzLF 🇵🇱 430 150 17 May 2025 657th adamnielson42 🇺🇸 424 152 6 Oct 2024 657th voidgloom 424 152 22 Oct 2024 659th snoozingnewt 🇺🇸 417 137 27 Jan 2025 660th MeWhenI 🇻🇦 417 143 2 Oct 2024 661st cdesodt 416 155 16 Oct 2024 662nd lhulinsky 410 157 21 Oct 2024 663rd ThatAlo 408 158 9 Dec 2024 664th dieggsy 405 247 10 Oct 2024 665th Mabeloid 🇳🇴 404 159 12 Oct 2024 666th CheeseCake628 🇳🇴 403 160 5 Nov 2024 666th osNiko 🇧🇷 403 160 2 days ago 668th pres-abhisheksinha 400 161 8 Oct 2024 669th ibixina 398 162 13 Oct 2024 669th TheAtrossian 398 162 5 Jan 2025 671st Ralac07 🇦🇺 396 162 3 Oct 2024 672nd Vaekor 391 165 15 Dec 2024 673rd fischfood 383 176 22 Oct 2024 674th JesseNoEyes 🇺🇸 381 169 1 Oct 2024 675th c0d3-4-F00d 🇩🇪 380 184 9 Jan 2025 Prev 601–675 of 726 Next